Bump the .NET SDK to 8.0.200 and stop using collection expressions with ImmutableArray<T>

.github/workflows/build.yml

@@ -45,7 +45,7 @@ jobs:
         dotnet-version: |
           6.0.418
           7.0.405
-          8.0.101
+          8.0.200
 
     # Arcade only allows the revision to contain up to two characters, and GitHub Actions does not roll-over
     # build numbers every day like Azure DevOps does. To balance these two requirements, set the official
@@ -105,7 +105,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v3
       with:
-        dotnet-version: '8.0.101'
+        dotnet-version: '8.0.200'
 
     - name: Validate NuGet packages
       shell: pwsh

Directory.Build.targets

@@ -117,7 +117,6 @@
   <PropertyGroup
     Condition=" ('$(TargetFrameworkIdentifier)' == '.NETCoreApp' And $([MSBuild]::VersionGreaterThanOrEquals($(TargetFrameworkVersion), '8.0'))) ">
     <DefineConstants>$(DefineConstants);SUPPORTS_HTTP_CLIENT_RESILIENCE</DefineConstants>
-    <DefineConstants>$(DefineConstants);SUPPORTS_IMMUTABLE_COLLECTIONS_MARSHAL</DefineConstants>
     <DefineConstants>$(DefineConstants);SUPPORTS_TIME_PROVIDER</DefineConstants>
   </PropertyGroup>
 

global.json

@@ -1,12 +1,12 @@
 {
   "sdk": {
-    "version": "8.0.101",
+    "version": "8.0.200",
     "allowPrerelease": true,
     "rollForward": "major"
   },
 
   "tools": {
-    "dotnet": "8.0.101",
+    "dotnet": "8.0.200",
 
     "runtimes": {
       "aspnetcore": [

shared/OpenIddict.Extensions/OpenIddictPolyfills.cs

@@ -1,11 +0,0 @@
-using System.Collections.Immutable;
-using System.Runtime.CompilerServices;
-
-#if !SUPPORTS_IMMUTABLE_COLLECTIONS_MARSHAL
-namespace System.Runtime.InteropServices;
-
-internal static class ImmutableCollectionsMarshal
-{
-    public static ImmutableArray<T> AsImmutableArray<T>(T[] array) => Unsafe.As<T[], ImmutableArray<T>>(ref array);
-}
-#endif

src/OpenIddict.Abstractions/OpenIddictExceptions.cs

@@ -109,7 +109,7 @@ public static class OpenIddictExceptions
         /// </summary>
         /// <param name="message">The exception message.</param>
         public ValidationException(string? message)
-            : this(message, [])
+            : this(message, ImmutableArray<ValidationResult>.Empty)
         {
         }
 

src/OpenIddict.Abstractions/Primitives/OpenIddictExtensions.cs

@@ -510,7 +510,7 @@ public static class OpenIddictExtensions
 
         if (string.IsNullOrEmpty(destinations))
         {
-            return [];
+            return ImmutableArray<string>.Empty;
         }
 
         using var document = JsonDocument.Parse(destinations);
@@ -620,7 +620,7 @@ public static class OpenIddictExtensions
     /// <param name="claim">The <see cref="Claim"/> instance.</param>
     /// <param name="destinations">The destinations.</param>
     public static Claim SetDestinations(this Claim claim, IEnumerable<string>? destinations)
-        => claim.SetDestinations(destinations?.ToImmutableArray() ?? []);
+        => claim.SetDestinations(destinations?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Adds specific destinations to a claim.
@@ -628,7 +628,7 @@ public static class OpenIddictExtensions
     /// <param name="claim">The <see cref="Claim"/> instance.</param>
     /// <param name="destinations">The destinations.</param>
     public static Claim SetDestinations(this Claim claim, params string[]? destinations)
-        => claim.SetDestinations(destinations?.ToImmutableArray() ?? []);
+        => claim.SetDestinations(destinations?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Gets the destinations associated with all the claims of the given identity.
@@ -2868,7 +2868,7 @@ public static class OpenIddictExtensions
     /// <param name="audiences">The audiences to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetAudiences(this ClaimsIdentity identity, IEnumerable<string>? audiences)
-        => identity.SetAudiences(audiences?.ToImmutableArray() ?? []);
+        => identity.SetAudiences(audiences?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the audiences list in the claims principal.
@@ -2878,7 +2878,7 @@ public static class OpenIddictExtensions
     /// <param name="audiences">The audiences to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetAudiences(this ClaimsPrincipal principal, IEnumerable<string>? audiences)
-        => principal.SetAudiences(audiences?.ToImmutableArray() ?? []);
+        => principal.SetAudiences(audiences?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the audiences list in the claims identity.
@@ -2888,7 +2888,7 @@ public static class OpenIddictExtensions
     /// <param name="audiences">The audiences to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetAudiences(this ClaimsIdentity identity, params string[]? audiences)
-        => identity.SetAudiences(audiences?.ToImmutableArray() ?? []);
+        => identity.SetAudiences(audiences?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the audiences list in the claims principal.
@@ -2898,7 +2898,7 @@ public static class OpenIddictExtensions
     /// <param name="audiences">The audiences to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetAudiences(this ClaimsPrincipal principal, params string[]? audiences)
-        => principal.SetAudiences(audiences?.ToImmutableArray() ?? []);
+        => principal.SetAudiences(audiences?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the presenters list in the claims identity.
@@ -2928,7 +2928,7 @@ public static class OpenIddictExtensions
     /// <param name="presenters">The presenters to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetPresenters(this ClaimsIdentity identity, IEnumerable<string>? presenters)
-        => identity.SetPresenters(presenters?.ToImmutableArray() ?? []);
+        => identity.SetPresenters(presenters?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the presenters list in the claims principal.
@@ -2938,7 +2938,7 @@ public static class OpenIddictExtensions
     /// <param name="presenters">The presenters to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetPresenters(this ClaimsPrincipal principal, IEnumerable<string>? presenters)
-        => principal.SetPresenters(presenters?.ToImmutableArray() ?? []);
+        => principal.SetPresenters(presenters?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the presenters list in the claims identity.
@@ -2948,7 +2948,7 @@ public static class OpenIddictExtensions
     /// <param name="presenters">The presenters to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetPresenters(this ClaimsIdentity identity, params string[]? presenters)
-        => identity.SetPresenters(presenters?.ToImmutableArray() ?? []);
+        => identity.SetPresenters(presenters?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the presenters list in the claims principal.
@@ -2958,7 +2958,7 @@ public static class OpenIddictExtensions
     /// <param name="presenters">The presenters to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetPresenters(this ClaimsPrincipal principal, params string[]? presenters)
-        => principal.SetPresenters(presenters?.ToImmutableArray() ?? []);
+        => principal.SetPresenters(presenters?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the resources list in the claims identity.
@@ -2988,7 +2988,7 @@ public static class OpenIddictExtensions
     /// <param name="resources">The resources to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetResources(this ClaimsIdentity identity, IEnumerable<string>? resources)
-        => identity.SetResources(resources?.ToImmutableArray() ?? []);
+        => identity.SetResources(resources?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the resources list in the claims principal.
@@ -2998,7 +2998,7 @@ public static class OpenIddictExtensions
     /// <param name="resources">The resources to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetResources(this ClaimsPrincipal principal, IEnumerable<string>? resources)
-        => principal.SetResources(resources?.ToImmutableArray() ?? []);
+        => principal.SetResources(resources?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the resources list in the claims identity.
@@ -3008,7 +3008,7 @@ public static class OpenIddictExtensions
     /// <param name="resources">The resources to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetResources(this ClaimsIdentity identity, params string[]? resources)
-        => identity.SetResources(resources?.ToImmutableArray() ?? []);
+        => identity.SetResources(resources?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the resources list in the claims principal.
@@ -3018,7 +3018,7 @@ public static class OpenIddictExtensions
     /// <param name="resources">The resources to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetResources(this ClaimsPrincipal principal, params string[]? resources)
-        => principal.SetResources(resources?.ToImmutableArray() ?? []);
+        => principal.SetResources(resources?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the scopes list in the claims identity.
@@ -3048,7 +3048,7 @@ public static class OpenIddictExtensions
     /// <param name="scopes">The scopes to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetScopes(this ClaimsIdentity identity, IEnumerable<string>? scopes)
-        => identity.SetScopes(scopes?.ToImmutableArray() ?? []);
+        => identity.SetScopes(scopes?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the scopes list in the claims principal.
@@ -3058,7 +3058,7 @@ public static class OpenIddictExtensions
     /// <param name="scopes">The scopes to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetScopes(this ClaimsPrincipal principal, IEnumerable<string>? scopes)
-        => principal.SetScopes(scopes?.ToImmutableArray() ?? []);
+        => principal.SetScopes(scopes?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the scopes list in the claims identity.
@@ -3068,7 +3068,7 @@ public static class OpenIddictExtensions
     /// <param name="scopes">The scopes to store.</param>
     /// <returns>The claims identity.</returns>
     public static ClaimsIdentity SetScopes(this ClaimsIdentity identity, params string[]? scopes)
-        => identity.SetScopes(scopes?.ToImmutableArray() ?? []);
+        => identity.SetScopes(scopes?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the scopes list in the claims principal.
@@ -3078,7 +3078,7 @@ public static class OpenIddictExtensions
     /// <param name="scopes">The scopes to store.</param>
     /// <returns>The claims principal.</returns>
     public static ClaimsPrincipal SetScopes(this ClaimsPrincipal principal, params string[]? scopes)
-        => principal.SetScopes(scopes?.ToImmutableArray() ?? []);
+        => principal.SetScopes(scopes?.ToImmutableArray() ?? ImmutableArray<string>.Empty);
 
     /// <summary>
     /// Sets the access token lifetime associated with the claims identity.
@@ -3266,7 +3266,7 @@ public static class OpenIddictExtensions
 
         if (string.IsNullOrEmpty(source))
         {
-            return [];
+            return ImmutableArray<string>.Empty;
         }
 
         var builder = ImmutableArray.CreateBuilder<string>();

src/OpenIddict.Client.AspNetCore/OpenIddictClientAspNetCoreHandlers.Authentication.cs

@@ -14,7 +14,7 @@ public static partial class OpenIddictClientAspNetCoreHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request processing:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictClientAspNetCoreHandlers
             ProcessPassthroughErrorResponse<ApplyRedirectionResponseContext, RequireRedirectionEndpointPassthroughEnabled>.Descriptor,
             ProcessStatusCodePagesErrorResponse<ApplyRedirectionResponseContext>.Descriptor,
             ProcessLocalErrorResponse<ApplyRedirectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for processing authorization requests using 302 redirects.

src/OpenIddict.Client.AspNetCore/OpenIddictClientAspNetCoreHandlers.Session.cs

@@ -14,7 +14,7 @@ public static partial class OpenIddictClientAspNetCoreHandlers
 {
     public static class Session
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Session request processing:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictClientAspNetCoreHandlers
             ProcessPassthroughErrorResponse<ApplyPostLogoutRedirectionResponseContext, RequirePostLogoutRedirectionEndpointPassthroughEnabled>.Descriptor,
             ProcessStatusCodePagesErrorResponse<ApplyPostLogoutRedirectionResponseContext>.Descriptor,
             ProcessLocalErrorResponse<ApplyPostLogoutRedirectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for processing authorization requests using 302 redirects.

src/OpenIddict.Client.AspNetCore/OpenIddictClientAspNetCoreHandlers.cs

@@ -30,7 +30,7 @@ namespace OpenIddict.Client.AspNetCore;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictClientAspNetCoreHandlers
 {
-    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -74,7 +74,7 @@ public static partial class OpenIddictClientAspNetCoreHandlers
 
         .. Authentication.DefaultHandlers,
         .. Session.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the ASP.NET Core environment.

src/OpenIddict.Client.DataProtection/OpenIddictClientDataProtectionHandlers.Protection.cs

@@ -21,7 +21,7 @@ public static partial class OpenIddictClientDataProtectionHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
@@ -32,7 +32,7 @@ public static partial class OpenIddictClientDataProtectionHandlers
              */
             OverrideGeneratedTokenFormat.Descriptor,
             GenerateDataProtectionToken.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating tokens generated using Data Protection.

src/OpenIddict.Client.DataProtection/OpenIddictClientDataProtectionHandlers.cs

@@ -13,5 +13,5 @@ namespace OpenIddict.Client.DataProtection;
 public static partial class OpenIddictClientDataProtectionHandlers
 {
     public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; }
-        = [.. Protection.DefaultHandlers];
+        = ImmutableArray.Create([.. Protection.DefaultHandlers]);
 }

src/OpenIddict.Client.Owin/OpenIddictClientOwinHandlers.Authentication.cs

@@ -13,7 +13,7 @@ public static partial class OpenIddictClientOwinHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request processing:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictClientOwinHandlers
             AttachCacheControlHeader<ApplyRedirectionResponseContext>.Descriptor,
             ProcessPassthroughErrorResponse<ApplyRedirectionResponseContext, RequireRedirectionEndpointPassthroughEnabled>.Descriptor,
             ProcessLocalErrorResponse<ApplyRedirectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for processing authorization requests using 302 redirects.

src/OpenIddict.Client.Owin/OpenIddictClientOwinHandlers.Session.cs

@@ -13,7 +13,7 @@ public static partial class OpenIddictClientOwinHandlers
 {
     public static class Session
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Session request processing:
              */
@@ -36,7 +36,7 @@ public static partial class OpenIddictClientOwinHandlers
             AttachCacheControlHeader<ApplyPostLogoutRedirectionResponseContext>.Descriptor,
             ProcessPassthroughErrorResponse<ApplyPostLogoutRedirectionResponseContext, RequirePostLogoutRedirectionEndpointPassthroughEnabled>.Descriptor,
             ProcessLocalErrorResponse<ApplyPostLogoutRedirectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for processing authorization requests using 302 redirects.

src/OpenIddict.Client.Owin/OpenIddictClientOwinHandlers.cs

@@ -25,7 +25,7 @@ namespace OpenIddict.Client.Owin;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictClientOwinHandlers
 {
-    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -68,7 +68,7 @@ public static partial class OpenIddictClientOwinHandlers
 
         .. Authentication.DefaultHandlers,
         .. Session.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the OWIN environment.

src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.Authentication.cs

@@ -23,7 +23,7 @@ public static partial class OpenIddictClientSystemIntegrationHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request processing:
              */
@@ -45,7 +45,7 @@ public static partial class OpenIddictClientSystemIntegrationHandlers
             ProcessEmptyHttpResponse.Descriptor,
             ProcessProtocolActivationResponse<ApplyRedirectionResponseContext>.Descriptor,
             ProcessWebAuthenticationResultResponse<ApplyRedirectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for initiating authorization requests using the web authentication broker.

src/OpenIddict.Client.SystemIntegration/OpenIddictClientSystemIntegrationHandlers.cs

@@ -31,7 +31,7 @@ namespace OpenIddict.Client.SystemIntegration;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictClientSystemIntegrationHandlers
 {
-    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -83,7 +83,7 @@ public static partial class OpenIddictClientSystemIntegrationHandlers
         AbortAuthenticationDemand.Descriptor,
 
         .. Authentication.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the HTTP listener request.

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.Device.cs

@@ -16,7 +16,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
 {
     public static class Device
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * DeviceAuthorization request processing:
              */
@@ -39,7 +39,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractDeviceAuthorizationResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractDeviceAuthorizationResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractDeviceAuthorizationResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the client credentials to the HTTP Authorization header.

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.Discovery.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration request processing:
              */
@@ -56,6 +56,6 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractCryptographyResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractCryptographyResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractCryptographyResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.Exchange.cs

@@ -16,7 +16,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
 {
     public static class Exchange
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token request processing:
              */
@@ -39,7 +39,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractTokenResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractTokenResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractTokenResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the client credentials to the HTTP Authorization header.

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.Introspection.cs

@@ -16,7 +16,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection request processing:
              */
@@ -39,7 +39,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractIntrospectionResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractIntrospectionResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractIntrospectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the client credentials to the HTTP Authorization header.

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.Revocation.cs

@@ -16,7 +16,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
 {
     public static class Revocation
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Revocation request processing:
              */
@@ -40,7 +40,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
             ExtractEmptyHttpResponse<ExtractRevocationResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractRevocationResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractRevocationResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the client credentials to the HTTP Authorization header.

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.Userinfo.cs

@@ -16,7 +16,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
 {
     public static class Userinfo
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Userinfo request processing:
              */
@@ -40,7 +40,7 @@ public static partial class OpenIddictClientSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractUserinfoResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractUserinfoResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractUserinfoResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the access token to the HTTP Authorization header.

src/OpenIddict.Client.SystemNetHttp/OpenIddictClientSystemNetHttpHandlers.cs

@@ -21,14 +21,14 @@ namespace OpenIddict.Client.SystemNetHttp;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictClientSystemNetHttpHandlers
 {
-    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         .. Device.DefaultHandlers,
         .. Discovery.DefaultHandlers,
         .. Exchange.DefaultHandlers,
         .. Introspection.DefaultHandlers,
         .. Revocation.DefaultHandlers,
         .. Userinfo.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for creating and attaching a <see cref="HttpClient"/>.

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Authentication.cs

@@ -13,12 +13,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request preparation:
              */
             MapNonStandardRequestParameters.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for mapping non-standard request parameters

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Device.cs

@@ -13,12 +13,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Device
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token response extraction:
              */
             MapNonStandardResponseParameters.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for mapping non-standard response parameters

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Discovery.cs

@@ -15,7 +15,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration response handling:
              */
@@ -25,7 +25,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
             AmendScopes.Descriptor,
             AmendClientAuthenticationMethods.Descriptor,
             AmendEndpoints.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for amending the issuer for the providers that require it.

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Exchange.cs

@@ -24,7 +24,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Exchange
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token request preparation:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
              * Token response extraction:
              */
             MapNonStandardResponseParameters.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for mapping non-standard request parameters

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Protection.cs

@@ -14,12 +14,12 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
             AmendTokenValidationParameters.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for amending the token validation parameters for the providers that require it.

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Revocation.cs

@@ -20,7 +20,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Revocation
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Revocation request preparation:
              */
@@ -30,7 +30,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
              * Revocation response extraction:
              */
             NormalizeContentType.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the client credentials to the HTTP Authorization

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.Userinfo.cs

@@ -21,7 +21,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
 {
     public static class Userinfo
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Userinfo request preparation:
              */
@@ -36,7 +36,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
              */
             NormalizeContentType.Descriptor,
             UnwrapUserinfoResponse.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for overriding the HTTP method for the providers that require it.

src/OpenIddict.Client.WebIntegration/OpenIddictClientWebIntegrationHandlers.cs

@@ -18,7 +18,7 @@ namespace OpenIddict.Client.WebIntegration;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictClientWebIntegrationHandlers
 {
-    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Authentication processing:
          */
@@ -62,7 +62,7 @@ public static partial class OpenIddictClientWebIntegrationHandlers
         .. Protection.DefaultHandlers,
         .. Revocation.DefaultHandlers,
         .. Userinfo.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for validating the signature or message authentication

src/OpenIddict.Client/OpenIddictClientHandlerDescriptor.cs

@@ -31,7 +31,7 @@ public sealed class OpenIddictClientHandlerDescriptor
     /// Gets the list of filters responsible for excluding the handler
     /// from the activated handlers if it doesn't meet the criteria.
     /// </summary>
-    public ImmutableArray<Type> FilterTypes { get; private set; } = [];
+    public ImmutableArray<Type> FilterTypes { get; private set; } = ImmutableArray<Type>.Empty;
 
     /// <summary>
     /// Gets the order assigned to the handler.

src/OpenIddict.Client/OpenIddictClientHandlers.Authentication.cs

@@ -13,7 +13,7 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request top-level processing:
              */
@@ -43,7 +43,7 @@ public static partial class OpenIddictClientHandlers
              * Redirection request validation:
              */
             ValidateTokens.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for preparing authorization requests and invoking the corresponding event handlers.

src/OpenIddict.Client/OpenIddictClientHandlers.Device.cs

@@ -14,14 +14,14 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Device
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Device authorization response handling:
              */
             ValidateWellKnownParameters.Descriptor,
             HandleErrorResponse.Descriptor,
             ValidateVerificationEndpointUri.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the device authorization response.

src/OpenIddict.Client/OpenIddictClientHandlers.Discovery.cs

@@ -15,7 +15,7 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration response handling:
              */
@@ -47,7 +47,7 @@ public static partial class OpenIddictClientHandlers
             ValidateWellKnownCryptographyParameters.Descriptor,
             HandleCryptographyErrorResponse.Descriptor,
             ExtractSigningKeys.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the configuration response.

src/OpenIddict.Client/OpenIddictClientHandlers.Exchange.cs

@@ -14,13 +14,13 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Exchange
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token response handling:
              */
             ValidateWellKnownParameters.Descriptor,
             HandleErrorResponse.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the token response.

src/OpenIddict.Client/OpenIddictClientHandlers.Introspection.cs

@@ -17,7 +17,7 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection response handling:
              */
@@ -29,7 +29,7 @@ public static partial class OpenIddictClientHandlers
             ValidateTokenUsage.Descriptor,
             PopulateClaims.Descriptor,
             MapInternalClaims.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the introspection response.
@@ -513,7 +513,7 @@ public static partial class OpenIddictClientHandlers
                     string identifier when !string.IsNullOrEmpty(identifier)
                         => ImmutableArray.Create(identifier),
 
-                    _ => []
+                    _ => ImmutableArray<string>.Empty
                 });
 
                 // Map the internal "oi_scp" claims from the standard, space-separated "scope" claim, if available.
@@ -521,7 +521,7 @@ public static partial class OpenIddictClientHandlers
                 {
                     string scope => scope.Split(Separators.Space, StringSplitOptions.RemoveEmptyEntries).ToImmutableArray(),
 
-                    _ => []
+                    _ => ImmutableArray<string>.Empty
                 });
 
                 return default;

src/OpenIddict.Client/OpenIddictClientHandlers.Protection.cs

@@ -19,7 +19,7 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
@@ -39,7 +39,7 @@ public static partial class OpenIddictClientHandlers
             CreateTokenEntry.Descriptor,
             GenerateIdentityModelToken.Descriptor,
             AttachTokenPayload.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for resolving the validation parameters used to validate tokens.

src/OpenIddict.Client/OpenIddictClientHandlers.Revocation.cs

@@ -14,13 +14,13 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Revocation
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Revocation response handling:
              */
             ValidateWellKnownParameters.Descriptor,
             HandleErrorResponse.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the revocation response.

src/OpenIddict.Client/OpenIddictClientHandlers.Session.cs

@@ -13,7 +13,7 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Session
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Logout request top-level processing:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictClientHandlers
              * Post-logout redirection request validation:
              */
             ValidateTokens.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for preparing authorization requests and invoking the corresponding event handlers.

src/OpenIddict.Client/OpenIddictClientHandlers.Userinfo.cs

@@ -16,14 +16,14 @@ public static partial class OpenIddictClientHandlers
 {
     public static class Userinfo
     {
-        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Userinfo response handling:
              */
             ValidateWellKnownParameters.Descriptor,
             HandleErrorResponse.Descriptor,
             PopulateClaims.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the userinfo response.

src/OpenIddict.Client/OpenIddictClientHandlers.cs

@@ -22,7 +22,7 @@ namespace OpenIddict.Client;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictClientHandlers
 {
-    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictClientHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -192,7 +192,7 @@ public static partial class OpenIddictClientHandlers
         .. Revocation.DefaultHandlers,
         .. Session.DefaultHandlers,
         .. Userinfo.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for inferring the endpoint type from the request URI.

src/OpenIddict.Client/OpenIddictClientService.cs

@@ -47,7 +47,7 @@ public class OpenIddictClientService
         var options = _provider.GetRequiredService<IOptionsMonitor<OpenIddictClientOptions>>();
         return new(options.CurrentValue.Registrations switch
         {
-            [  ]               => ImmutableArray.Create<OpenIddictClientRegistration>(),
+            [  ]               => ImmutableArray<OpenIddictClientRegistration>.Empty,
             [..] registrations => registrations.ToImmutableArray()
         });
     }

src/OpenIddict.Core/Managers/OpenIddictApplicationManager.cs

@@ -1025,9 +1025,11 @@ public class OpenIddictApplicationManager<TApplication> : IOpenIddictApplication
         await Store.SetDisplayNamesAsync(application, descriptor.DisplayNames.ToImmutableDictionary(), cancellationToken);
         await Store.SetJsonWebKeySetAsync(application, descriptor.JsonWebKeySet, cancellationToken);
         await Store.SetPermissionsAsync(application, descriptor.Permissions.ToImmutableArray(), cancellationToken);
-        await Store.SetPostLogoutRedirectUrisAsync(application, [.. descriptor.PostLogoutRedirectUris.Select(uri => uri.OriginalString)], cancellationToken);
+        await Store.SetPostLogoutRedirectUrisAsync(application,
+            descriptor.PostLogoutRedirectUris.Select(uri => uri.OriginalString).ToImmutableArray(), cancellationToken);
         await Store.SetPropertiesAsync(application, descriptor.Properties.ToImmutableDictionary(), cancellationToken);
-        await Store.SetRedirectUrisAsync(application, [.. descriptor.RedirectUris.Select(uri => uri.OriginalString)], cancellationToken);
+        await Store.SetRedirectUrisAsync(application,
+            descriptor.RedirectUris.Select(uri => uri.OriginalString).ToImmutableArray(), cancellationToken);
         await Store.SetRequirementsAsync(application, descriptor.Requirements.ToImmutableArray(), cancellationToken);
         await Store.SetSettingsAsync(application, descriptor.Settings.ToImmutableDictionary(), cancellationToken);
     }
@@ -1322,9 +1324,9 @@ public class OpenIddictApplicationManager<TApplication> : IOpenIddictApplication
 
             // When callback URIs are specified, ensure they are valid and spec-compliant.
             // See https://tools.ietf.org/html/rfc6749#section-3.1 for more information.
-            foreach (var uri in ImmutableArray.Create<string>()
+            foreach (var uri in (List<string>) [
-                .AddRange(await Store.GetPostLogoutRedirectUrisAsync(application, cancellationToken))
+                .. await Store.GetPostLogoutRedirectUrisAsync(application, cancellationToken),
-                .AddRange(await Store.GetRedirectUrisAsync(application, cancellationToken)))
+                .. await Store.GetRedirectUrisAsync(application, cancellationToken)])
             {
                 // Ensure the URI is not null or empty.
                 if (string.IsNullOrEmpty(uri))

src/OpenIddict.EntityFramework/Stores/OpenIddictEntityFrameworkApplicationStore.cs

@@ -489,7 +489,7 @@ public class OpenIddictEntityFrameworkApplicationStore<TApplication, TAuthorizat
 
         if (string.IsNullOrEmpty(application.Permissions))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified permissions is an expensive operation.
@@ -530,7 +530,7 @@ public class OpenIddictEntityFrameworkApplicationStore<TApplication, TAuthorizat
 
         if (string.IsNullOrEmpty(application.PostLogoutRedirectUris))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified URIs is an expensive operation.
@@ -606,7 +606,7 @@ public class OpenIddictEntityFrameworkApplicationStore<TApplication, TAuthorizat
 
         if (string.IsNullOrEmpty(application.RedirectUris))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified URIs is an expensive operation.
@@ -647,7 +647,7 @@ public class OpenIddictEntityFrameworkApplicationStore<TApplication, TAuthorizat
 
         if (string.IsNullOrEmpty(application.Requirements))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified requirements is an expensive operation.

src/OpenIddict.EntityFramework/Stores/OpenIddictEntityFrameworkAuthorizationStore.cs

@@ -486,7 +486,7 @@ public class OpenIddictEntityFrameworkAuthorizationStore<TAuthorization, TApplic
 
         if (string.IsNullOrEmpty(authorization.Scopes))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified scopes is an expensive operation.

src/OpenIddict.EntityFramework/Stores/OpenIddictEntityFrameworkScopeStore.cs

@@ -407,7 +407,7 @@ public class OpenIddictEntityFrameworkScopeStore<TScope, TContext, TKey> : IOpen
 
         if (string.IsNullOrEmpty(scope.Resources))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified resources is an expensive operation.

src/OpenIddict.EntityFrameworkCore/Stores/OpenIddictEntityFrameworkCoreApplicationStore.cs

@@ -558,7 +558,7 @@ public class OpenIddictEntityFrameworkCoreApplicationStore<TApplication, TAuthor
 
         if (string.IsNullOrEmpty(application.Permissions))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified permissions is an expensive operation.
@@ -599,7 +599,7 @@ public class OpenIddictEntityFrameworkCoreApplicationStore<TApplication, TAuthor
 
         if (string.IsNullOrEmpty(application.PostLogoutRedirectUris))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified URIs is an expensive operation.
@@ -675,7 +675,7 @@ public class OpenIddictEntityFrameworkCoreApplicationStore<TApplication, TAuthor
 
         if (string.IsNullOrEmpty(application.RedirectUris))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified URIs is an expensive operation.
@@ -716,7 +716,7 @@ public class OpenIddictEntityFrameworkCoreApplicationStore<TApplication, TAuthor
 
         if (string.IsNullOrEmpty(application.Requirements))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified requirements is an expensive operation.

src/OpenIddict.EntityFrameworkCore/Stores/OpenIddictEntityFrameworkCoreAuthorizationStore.cs

@@ -574,7 +574,7 @@ public class OpenIddictEntityFrameworkCoreAuthorizationStore<TAuthorization, TAp
 
         if (string.IsNullOrEmpty(authorization.Scopes))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified scopes is an expensive operation.

src/OpenIddict.EntityFrameworkCore/Stores/OpenIddictEntityFrameworkCoreScopeStore.cs

@@ -423,7 +423,7 @@ public class OpenIddictEntityFrameworkCoreScopeStore<TScope, TContext, TKey> : I
 
         if (string.IsNullOrEmpty(scope.Resources))
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         // Note: parsing the stringified resources is an expensive operation.

src/OpenIddict.MongoDb/Stores/OpenIddictMongoDbApplicationStore.cs

@@ -323,7 +323,7 @@ public class OpenIddictMongoDbApplicationStore<TApplication> : IOpenIddictApplic
 
         if (application.Permissions is not { Count: > 0 })
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         return new(application.Permissions.ToImmutableArray());
@@ -340,7 +340,7 @@ public class OpenIddictMongoDbApplicationStore<TApplication> : IOpenIddictApplic
 
         if (application.PostLogoutRedirectUris is not { Count: > 0 })
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         return new(application.PostLogoutRedirectUris.ToImmutableArray());
@@ -381,7 +381,7 @@ public class OpenIddictMongoDbApplicationStore<TApplication> : IOpenIddictApplic
 
         if (application.RedirectUris is not { Count: > 0 })
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         return new(application.RedirectUris.ToImmutableArray());
@@ -397,7 +397,7 @@ public class OpenIddictMongoDbApplicationStore<TApplication> : IOpenIddictApplic
 
         if (application.Requirements is not { Count: > 0 })
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         return new(application.Requirements.ToImmutableArray());

src/OpenIddict.MongoDb/Stores/OpenIddictMongoDbAuthorizationStore.cs

@@ -415,7 +415,7 @@ public class OpenIddictMongoDbAuthorizationStore<TAuthorization> : IOpenIddictAu
 
         if (authorization.Scopes is not { Count: > 0 })
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         return new(authorization.Scopes.ToImmutableArray());

src/OpenIddict.MongoDb/Stores/OpenIddictMongoDbScopeStore.cs

@@ -302,7 +302,7 @@ public class OpenIddictMongoDbScopeStore<TScope> : IOpenIddictScopeStore<TScope>
 
         if (scope.Resources is not { Count: > 0 })
         {
-            return new([]);
+            return new(ImmutableArray<string>.Empty);
         }
 
         return new(scope.Resources.ToImmutableArray());

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Authentication.cs

@@ -28,7 +28,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request extraction:
              */
@@ -53,7 +53,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             ProcessPassthroughErrorResponse<ApplyAuthorizationResponseContext, RequireAuthorizationEndpointPassthroughEnabled>.Descriptor,
             ProcessStatusCodePagesErrorResponse<ApplyAuthorizationResponseContext>.Descriptor,
             ProcessLocalErrorResponse<ApplyAuthorizationResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for restoring cached requests from the request_id, if specified.

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Device.cs

@@ -14,7 +14,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Device
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Device request extraction:
              */
@@ -50,7 +50,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             ProcessStatusCodePagesErrorResponse<ApplyVerificationResponseContext>.Descriptor,
             ProcessLocalErrorResponse<ApplyVerificationResponseContext>.Descriptor,
             ProcessEmptyResponse<ApplyVerificationResponseContext>.Descriptor
-        ];
+        ]);
     }
 
     /// <summary>

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Discovery.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration request extraction:
              */
@@ -36,6 +36,6 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             AttachHttpResponseCode<ApplyCryptographyResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyCryptographyResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyCryptographyResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Exchange.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Exchange
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token request extraction:
              */
@@ -32,6 +32,6 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             AttachCacheControlHeader<ApplyTokenResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyTokenResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyTokenResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Introspection.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection request extraction:
              */
@@ -26,6 +26,6 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             AttachHttpResponseCode<ApplyIntrospectionResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyIntrospectionResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyIntrospectionResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Revocation.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Revocation
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Revocation request extraction:
              */
@@ -27,6 +27,6 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             AttachCacheControlHeader<ApplyRevocationResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyRevocationResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyRevocationResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Session.cs

@@ -25,7 +25,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Session
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Logout request extraction:
              */
@@ -50,7 +50,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             ProcessLocalErrorResponse<ApplyLogoutResponseContext>.Descriptor,
             ProcessQueryResponse.Descriptor,
             ProcessEmptyResponse<ApplyLogoutResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for restoring cached requests from the request_id, if specified.

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.Userinfo.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
 {
     public static class Userinfo
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Userinfo request extraction:
              */
@@ -31,6 +31,6 @@ public static partial class OpenIddictServerAspNetCoreHandlers
             AttachWwwAuthenticateHeader<ApplyUserinfoResponseContext>.Descriptor,
             ProcessChallengeErrorResponse<ApplyUserinfoResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyUserinfoResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.AspNetCore/OpenIddictServerAspNetCoreHandlers.cs

@@ -28,7 +28,7 @@ namespace OpenIddict.Server.AspNetCore;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictServerAspNetCoreHandlers
 {
-    public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -60,7 +60,7 @@ public static partial class OpenIddictServerAspNetCoreHandlers
         .. Revocation.DefaultHandlers,
         .. Session.DefaultHandlers,
         .. Userinfo.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the ASP.NET Core environment.

src/OpenIddict.Server.DataProtection/OpenIddictServerDataProtectionHandlers.Protection.cs

@@ -21,7 +21,7 @@ public static partial class OpenIddictServerDataProtectionHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
@@ -32,7 +32,7 @@ public static partial class OpenIddictServerDataProtectionHandlers
              */
             OverrideGeneratedTokenFormat.Descriptor,
             GenerateDataProtectionToken.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating tokens generated using Data Protection.

src/OpenIddict.Server.DataProtection/OpenIddictServerDataProtectionHandlers.cs

@@ -13,5 +13,5 @@ namespace OpenIddict.Server.DataProtection;
 public static partial class OpenIddictServerDataProtectionHandlers
 {
     public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; }
-        = [.. Protection.DefaultHandlers];
+        = ImmutableArray.Create([.. Protection.DefaultHandlers]);
 }

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Authentication.cs

@@ -26,7 +26,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request extraction:
              */
@@ -52,7 +52,7 @@ public static partial class OpenIddictServerOwinHandlers
             ProcessFragmentResponse.Descriptor,
             ProcessPassthroughErrorResponse<ApplyAuthorizationResponseContext, RequireAuthorizationEndpointPassthroughEnabled>.Descriptor,
             ProcessLocalErrorResponse<ApplyAuthorizationResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for restoring cached requests from the request_id, if specified.

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Device.cs

@@ -14,7 +14,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Device
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Device request extraction:
              */
@@ -53,7 +53,7 @@ public static partial class OpenIddictServerOwinHandlers
             ProcessPassthroughErrorResponse<ApplyVerificationResponseContext, RequireVerificationEndpointPassthroughEnabled>.Descriptor,
             ProcessLocalErrorResponse<ApplyVerificationResponseContext>.Descriptor,
             ProcessEmptyResponse<ApplyVerificationResponseContext>.Descriptor
-        ];
+        ]);
     }
 
     /// <summary>

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Discovery.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration request extraction:
              */
@@ -40,6 +40,6 @@ public static partial class OpenIddictServerOwinHandlers
             SuppressFormsAuthenticationRedirect<ApplyCryptographyResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyCryptographyResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyCryptographyResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Exchange.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Exchange
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token request extraction:
              */
@@ -34,6 +34,6 @@ public static partial class OpenIddictServerOwinHandlers
             AttachCacheControlHeader<ApplyTokenResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyTokenResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyTokenResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Introspection.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection request extraction:
              */
@@ -28,6 +28,6 @@ public static partial class OpenIddictServerOwinHandlers
             SuppressFormsAuthenticationRedirect<ApplyIntrospectionResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyIntrospectionResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyIntrospectionResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Revocation.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Revocation
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Revocation request extraction:
              */
@@ -29,6 +29,6 @@ public static partial class OpenIddictServerOwinHandlers
             AttachCacheControlHeader<ApplyRevocationResponseContext>.Descriptor,
             AttachWwwAuthenticateHeader<ApplyRevocationResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyRevocationResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Session.cs

@@ -24,7 +24,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Session
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Logout request extraction:
              */
@@ -50,7 +50,7 @@ public static partial class OpenIddictServerOwinHandlers
             ProcessLocalErrorResponse<ApplyLogoutResponseContext>.Descriptor,
             ProcessQueryResponse.Descriptor,
             ProcessEmptyResponse<ApplyLogoutResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for restoring cached requests from the request_id, if specified.

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.Userinfo.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictServerOwinHandlers
 {
     public static class Userinfo
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Userinfo request extraction:
              */
@@ -33,6 +33,6 @@ public static partial class OpenIddictServerOwinHandlers
             AttachWwwAuthenticateHeader<ApplyUserinfoResponseContext>.Descriptor,
             ProcessChallengeErrorResponse<ApplyUserinfoResponseContext>.Descriptor,
             ProcessJsonResponse<ApplyUserinfoResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Server.Owin/OpenIddictServerOwinHandlers.cs

@@ -23,7 +23,7 @@ namespace OpenIddict.Server.Owin;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictServerOwinHandlers
 {
-    public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -55,7 +55,7 @@ public static partial class OpenIddictServerOwinHandlers
         .. Revocation.DefaultHandlers,
         .. Session.DefaultHandlers,
         .. Userinfo.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the OWIN environment.

src/OpenIddict.Server/OpenIddictServerHandlerDescriptor.cs

@@ -31,7 +31,7 @@ public sealed class OpenIddictServerHandlerDescriptor
     /// Gets the list of filters responsible for excluding the handler
     /// from the activated handlers if it doesn't meet the criteria.
     /// </summary>
-    public ImmutableArray<Type> FilterTypes { get; private set; } = [];
+    public ImmutableArray<Type> FilterTypes { get; private set; } = ImmutableArray<Type>.Empty;
 
     /// <summary>
     /// Gets the order assigned to the handler.

src/OpenIddict.Server/OpenIddictServerHandlers.Authentication.cs

@@ -17,7 +17,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Authentication
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Authorization request top-level processing:
              */
@@ -65,7 +65,7 @@ public static partial class OpenIddictServerHandlers
             InferResponseMode.Descriptor,
             AttachResponseState.Descriptor,
             AttachIssuer.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting authorization requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Device.cs

@@ -18,7 +18,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Device
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Device request top-level processing:
              */
@@ -61,7 +61,7 @@ public static partial class OpenIddictServerHandlers
              * Verification request handling:
              */
             AttachUserCodePrincipal.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting device requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Discovery.cs

@@ -18,7 +18,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration request top-level processing:
              */
@@ -57,7 +57,7 @@ public static partial class OpenIddictServerHandlers
              * Cryptography request handling:
              */
             AttachSigningKeys.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting configuration requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Exchange.cs

@@ -21,7 +21,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Exchange
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token request top-level processing:
              */
@@ -65,7 +65,7 @@ public static partial class OpenIddictServerHandlers
              * Token response handling:
              */
             NormalizeErrorResponse.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting token requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Introspection.cs

@@ -21,7 +21,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection request top-level processing:
              */
@@ -52,7 +52,7 @@ public static partial class OpenIddictServerHandlers
              * Introspection response handling:
              */
             NormalizeErrorResponse.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting introspection requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Protection.cs

@@ -22,7 +22,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
@@ -45,7 +45,7 @@ public static partial class OpenIddictServerHandlers
             GenerateIdentityModelToken.Descriptor,
             AttachTokenPayload.Descriptor,
             BeautifyToken.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for resolving the validation parameters used to validate tokens.

src/OpenIddict.Server/OpenIddictServerHandlers.Revocation.cs

@@ -15,7 +15,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Revocation
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Revocation request top-level processing:
              */
@@ -45,7 +45,7 @@ public static partial class OpenIddictServerHandlers
              * Revocation response handling:
              */
             NormalizeErrorResponse.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting revocation requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Session.cs

@@ -18,7 +18,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Session
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Logout request top-level processing:
              */
@@ -48,7 +48,7 @@ public static partial class OpenIddictServerHandlers
              */
             AttachPostLogoutRedirectUri.Descriptor,
             AttachResponseState.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting logout requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.Userinfo.cs

@@ -15,7 +15,7 @@ public static partial class OpenIddictServerHandlers
 {
     public static class Userinfo
     {
-        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Userinfo request top-level processing:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictServerHandlers
             AttachPrincipal.Descriptor,
             AttachAudiences.Descriptor,
             AttachClaims.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for extracting userinfo requests and invoking the corresponding event handlers.

src/OpenIddict.Server/OpenIddictServerHandlers.cs

@@ -22,7 +22,7 @@ namespace OpenIddict.Server;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictServerHandlers
 {
-    public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictServerHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Top-level request processing:
          */
@@ -116,7 +116,7 @@ public static partial class OpenIddictServerHandlers
         .. Revocation.DefaultHandlers,
         .. Session.DefaultHandlers,
         .. Userinfo.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for inferring the endpoint type from the request URI.
@@ -2497,7 +2497,7 @@ public static partial class OpenIddictServerHandlers
             }
 
             // Reset the audiences collection, as it's later set, based on the token type.
-            context.Principal.SetAudiences(ImmutableArray.Create<string>());
+            context.Principal.SetAudiences(ImmutableArray<string>.Empty);
 
             return default;
         }

src/OpenIddict.Validation.AspNetCore/OpenIddictValidationAspNetCoreHandlers.cs

@@ -26,7 +26,7 @@ namespace OpenIddict.Validation.AspNetCore;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictValidationAspNetCoreHandlers
 {
-    public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Request top-level processing:
          */
@@ -58,7 +58,7 @@ public static partial class OpenIddictValidationAspNetCoreHandlers
         AttachCacheControlHeader<ProcessErrorContext>.Descriptor,
         AttachWwwAuthenticateHeader<ProcessErrorContext>.Descriptor,
         ProcessChallengeErrorResponse<ProcessErrorContext>.Descriptor
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the ASP.NET Core environment.

src/OpenIddict.Validation.DataProtection/OpenIddictValidationDataProtectionHandlers.Protection.cs

@@ -21,12 +21,12 @@ public static partial class OpenIddictValidationDataProtectionHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
             ValidateDataProtectionToken.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating tokens generated using Data Protection.

src/OpenIddict.Validation.DataProtection/OpenIddictValidationDataProtectionHandlers.cs

@@ -13,5 +13,5 @@ namespace OpenIddict.Validation.DataProtection;
 public static partial class OpenIddictValidationDataProtectionHandlers
 {
     public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; }
-        = [.. Protection.DefaultHandlers];
+        = ImmutableArray.Create([.. Protection.DefaultHandlers]);
 }

src/OpenIddict.Validation.Owin/OpenIddictValidationOwinHandlers.cs

@@ -22,7 +22,7 @@ namespace OpenIddict.Validation.Owin;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictValidationOwinHandlers
 {
-    public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Request top-level processing:
          */
@@ -57,7 +57,7 @@ public static partial class OpenIddictValidationOwinHandlers
         AttachCacheControlHeader<ProcessErrorContext>.Descriptor,
         AttachWwwAuthenticateHeader<ProcessErrorContext>.Descriptor,
         ProcessChallengeErrorResponse<ProcessErrorContext>.Descriptor
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for resolving the request URI from the OWIN environment.

src/OpenIddict.Validation.SystemNetHttp/OpenIddictValidationSystemNetHttpHandlers.Discovery.cs

@@ -12,7 +12,7 @@ public static partial class OpenIddictValidationSystemNetHttpHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration request processing:
              */
@@ -56,6 +56,6 @@ public static partial class OpenIddictValidationSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractCryptographyResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractCryptographyResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractCryptographyResponseContext>.Descriptor
-        ];
+        ]);
     }
 }

src/OpenIddict.Validation.SystemNetHttp/OpenIddictValidationSystemNetHttpHandlers.Introspection.cs

@@ -16,7 +16,7 @@ public static partial class OpenIddictValidationSystemNetHttpHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection request processing:
              */
@@ -39,7 +39,7 @@ public static partial class OpenIddictValidationSystemNetHttpHandlers
             ExtractWwwAuthenticateHeader<ExtractIntrospectionResponseContext>.Descriptor,
             ValidateHttpResponse<ExtractIntrospectionResponseContext>.Descriptor,
             DisposeHttpResponse<ExtractIntrospectionResponseContext>.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for attaching the client credentials to the HTTP Authorization header.

src/OpenIddict.Validation.SystemNetHttp/OpenIddictValidationSystemNetHttpHandlers.cs

@@ -22,7 +22,7 @@ namespace OpenIddict.Validation.SystemNetHttp;
 public static partial class OpenIddictValidationSystemNetHttpHandlers
 {
     public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; }
-        = [.. Discovery.DefaultHandlers, .. Introspection.DefaultHandlers];
+        = ImmutableArray.Create([.. Discovery.DefaultHandlers, .. Introspection.DefaultHandlers]);
 
     /// <summary>
     /// Contains the logic responsible for creating and attaching a <see cref="HttpClient"/>.

src/OpenIddict.Validation/OpenIddictValidationHandlerDescriptor.cs

@@ -31,7 +31,7 @@ public sealed class OpenIddictValidationHandlerDescriptor
     /// Gets the list of filters responsible for excluding the handler
     /// from the activated handlers if it doesn't meet the criteria.
     /// </summary>
-    public ImmutableArray<Type> FilterTypes { get; private set; } = [];
+    public ImmutableArray<Type> FilterTypes { get; private set; } = ImmutableArray<Type>.Empty;
 
     /// <summary>
     /// Gets the order assigned to the handler.

src/OpenIddict.Validation/OpenIddictValidationHandlers.Discovery.cs

@@ -15,7 +15,7 @@ public static partial class OpenIddictValidationHandlers
 {
     public static class Discovery
     {
-        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Configuration response handling:
              */
@@ -32,7 +32,7 @@ public static partial class OpenIddictValidationHandlers
             ValidateWellKnownCryptographyParameters.Descriptor,
             HandleCryptographyErrorResponse.Descriptor,
             ExtractSigningKeys.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the configuration response.

src/OpenIddict.Validation/OpenIddictValidationHandlers.Introspection.cs

@@ -17,7 +17,7 @@ public static partial class OpenIddictValidationHandlers
 {
     public static class Introspection
     {
-        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Introspection response handling:
              */
@@ -29,7 +29,7 @@ public static partial class OpenIddictValidationHandlers
             ValidateTokenUsage.Descriptor,
             PopulateClaims.Descriptor,
             MapInternalClaims.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for validating the well-known parameters contained in the introspection response.
@@ -507,7 +507,7 @@ public static partial class OpenIddictValidationHandlers
                     string identifier when !string.IsNullOrEmpty(identifier)
                         => ImmutableArray.Create(identifier),
 
-                    _ => []
+                    _ => ImmutableArray<string>.Empty
                 });
 
                 // Map the internal "oi_scp" claims from the standard, space-separated "scope" claim, if available.
@@ -515,7 +515,7 @@ public static partial class OpenIddictValidationHandlers
                 {
                     string scope => scope.Split(Separators.Space, StringSplitOptions.RemoveEmptyEntries).ToImmutableArray(),
 
-                    _ => []
+                    _ => ImmutableArray<string>.Empty
                 });
 
                 return default;

src/OpenIddict.Validation/OpenIddictValidationHandlers.Protection.cs

@@ -17,7 +17,7 @@ public static partial class OpenIddictValidationHandlers
 {
     public static class Protection
     {
-        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+        public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
             /*
              * Token validation:
              */
@@ -38,7 +38,7 @@ public static partial class OpenIddictValidationHandlers
              */
             AttachSecurityCredentials.Descriptor,
             GenerateIdentityModelToken.Descriptor
-        ];
+        ]);
 
         /// <summary>
         /// Contains the logic responsible for resolving the validation parameters used to validate tokens.

src/OpenIddict.Validation/OpenIddictValidationHandlers.cs

@@ -18,7 +18,7 @@ namespace OpenIddict.Validation;
 [EditorBrowsable(EditorBrowsableState.Never)]
 public static partial class OpenIddictValidationHandlers
 {
-    public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = [
+    public static ImmutableArray<OpenIddictValidationHandlerDescriptor> DefaultHandlers { get; } = ImmutableArray.Create([
         /*
          * Authentication processing:
          */
@@ -52,7 +52,7 @@ public static partial class OpenIddictValidationHandlers
         .. Discovery.DefaultHandlers,
         .. Introspection.DefaultHandlers,
         .. Protection.DefaultHandlers
-    ];
+    ]);
 
     /// <summary>
     /// Contains the logic responsible for selecting the token types that should be validated.

test/OpenIddict.Abstractions.Tests/Primitives/OpenIddictExtensionsTests.cs

@@ -2084,7 +2084,7 @@ public class OpenIddictExtensionsTests
         var identity = (ClaimsIdentity) null!;
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentNullException>(() => identity.AddClaims("type", []));
+        var exception = Assert.Throws<ArgumentNullException>(() => identity.AddClaims("type", ImmutableArray<string>.Empty));
 
         Assert.Equal("identity", exception.ParamName);
     }
@@ -2096,7 +2096,7 @@ public class OpenIddictExtensionsTests
         var principal = (ClaimsPrincipal) null!;
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentNullException>(() => principal.AddClaims("type", []));
+        var exception = Assert.Throws<ArgumentNullException>(() => principal.AddClaims("type", ImmutableArray<string>.Empty));
 
         Assert.Equal("principal", exception.ParamName);
     }
@@ -2108,7 +2108,7 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal();
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentException>(() => principal.AddClaims("type", ["value1", "value2"]));
+        var exception = Assert.Throws<ArgumentException>(() => principal.AddClaims("type", ImmutableArray.Create("value1", "value2")));
 
         Assert.Equal("principal", exception.ParamName);
         Assert.StartsWith(SR.GetResourceString(SR.ID0286), exception.Message);
@@ -2123,7 +2123,7 @@ public class OpenIddictExtensionsTests
         var identity = new ClaimsIdentity();
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentException>(() => identity.AddClaims(type, []));
+        var exception = Assert.Throws<ArgumentException>(() => identity.AddClaims(type, ImmutableArray<string>.Empty));
 
         Assert.Equal("type", exception.ParamName);
         Assert.StartsWith(SR.GetResourceString(SR.ID0184), exception.Message);
@@ -2138,7 +2138,7 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal(new ClaimsIdentity());
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentException>(() => principal.AddClaims(type, []));
+        var exception = Assert.Throws<ArgumentException>(() => principal.AddClaims(type, ImmutableArray<string>.Empty));
 
         Assert.Equal("type", exception.ParamName);
         Assert.StartsWith(SR.GetResourceString(SR.ID0184), exception.Message);
@@ -2151,7 +2151,7 @@ public class OpenIddictExtensionsTests
         var identity = new ClaimsIdentity();
 
         // Act
-        identity.AddClaims("type", ["value1", "value2"], "issuer");
+        identity.AddClaims("type", ImmutableArray.Create("value1", "value2"), "issuer");
 
         // Assert
         var claims = identity.FindAll("type").ToArray();
@@ -2171,7 +2171,7 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal(new ClaimsIdentity());
 
         // Act
-        principal.AddClaims("type", ["value1", "value2"], "issuer");
+        principal.AddClaims("type", ImmutableArray.Create("value1", "value2"), "issuer");
 
         // Assert
         var claims = principal.FindAll("type").ToArray();
@@ -2191,10 +2191,10 @@ public class OpenIddictExtensionsTests
         var identity = new ClaimsIdentity();
 
         // Act
-        identity.AddClaims("TYPE", ["value1", "value2"]);
+        identity.AddClaims("TYPE", ImmutableArray.Create("value1", "value2"));
 
         // Assert
-        Assert.Equal<string>(["value1", "value2"], identity.GetClaims("type"));
+        Assert.Equal<string>(ImmutableArray.Create("value1", "value2"), identity.GetClaims("type"));
     }
 
     [Fact]
@@ -2204,10 +2204,10 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal(new ClaimsIdentity());
 
         // Act
-        principal.AddClaims("TYPE", ["value1", "value2"]);
+        principal.AddClaims("TYPE", ImmutableArray.Create("value1", "value2"));
 
         // Assert
-        Assert.Equal<string>(["value1", "value2"], principal.GetClaims("type"));
+        Assert.Equal<string>(ImmutableArray.Create("value1", "value2"), principal.GetClaims("type"));
     }
 
     [Fact]
@@ -3612,7 +3612,7 @@ public class OpenIddictExtensionsTests
         var identity = (ClaimsIdentity) null!;
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentNullException>(() => identity.SetClaims("type", []));
+        var exception = Assert.Throws<ArgumentNullException>(() => identity.SetClaims("type", ImmutableArray<string>.Empty));
 
         Assert.Equal("identity", exception.ParamName);
     }
@@ -3624,7 +3624,7 @@ public class OpenIddictExtensionsTests
         var principal = (ClaimsPrincipal) null!;
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentNullException>(() => principal.SetClaims("type", []));
+        var exception = Assert.Throws<ArgumentNullException>(() => principal.SetClaims("type", ImmutableArray<string>.Empty));
 
         Assert.Equal("principal", exception.ParamName);
     }
@@ -3636,7 +3636,7 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal();
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentException>(() => principal.SetClaims("type", ["value1", "value2"]));
+        var exception = Assert.Throws<ArgumentException>(() => principal.SetClaims("type", ImmutableArray.Create("value1", "value2")));
 
         Assert.Equal("principal", exception.ParamName);
         Assert.StartsWith(SR.GetResourceString(SR.ID0286), exception.Message);
@@ -3651,7 +3651,7 @@ public class OpenIddictExtensionsTests
         var identity = new ClaimsIdentity();
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentException>(() => identity.SetClaims(type, []));
+        var exception = Assert.Throws<ArgumentException>(() => identity.SetClaims(type, ImmutableArray<string>.Empty));
 
         Assert.Equal("type", exception.ParamName);
         Assert.StartsWith(SR.GetResourceString(SR.ID0184), exception.Message);
@@ -3666,7 +3666,7 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal(new ClaimsIdentity());
 
         // Act and assert
-        var exception = Assert.Throws<ArgumentException>(() => principal.SetClaims(type, []));
+        var exception = Assert.Throws<ArgumentException>(() => principal.SetClaims(type, ImmutableArray<string>.Empty));
 
         Assert.Equal("type", exception.ParamName);
         Assert.StartsWith(SR.GetResourceString(SR.ID0184), exception.Message);
@@ -3679,7 +3679,7 @@ public class OpenIddictExtensionsTests
         var identity = new ClaimsIdentity();
 
         // Act
-        identity.SetClaims("type", ["value1", "value2"], "issuer");
+        identity.SetClaims("type", ImmutableArray.Create("value1", "value2"), "issuer");
 
         // Assert
         var claims = identity.FindAll("type").ToArray();
@@ -3699,7 +3699,7 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal(new ClaimsIdentity());
 
         // Act
-        principal.SetClaims("type", ["value1", "value2"], "issuer");
+        principal.SetClaims("type", ImmutableArray.Create("value1", "value2"), "issuer");
 
         // Assert
         var claims = principal.FindAll("type").ToArray();
@@ -3718,10 +3718,10 @@ public class OpenIddictExtensionsTests
         var identity = new ClaimsIdentity();
 
         // Act
-        identity.SetClaims("TYPE", ["value1", "value2"]);
+        identity.SetClaims("TYPE", ImmutableArray.Create("value1", "value2"));
 
         // Assert
-        Assert.Equal<string>(["value1", "value2"], identity.GetClaims("type"));
+        Assert.Equal<string>(ImmutableArray.Create("value1", "value2"), identity.GetClaims("type"));
     }
 
     [Fact]
@@ -3731,10 +3731,10 @@ public class OpenIddictExtensionsTests
         var principal = new ClaimsPrincipal(new ClaimsIdentity());
 
         // Act
-        principal.SetClaims("TYPE", ["value1", "value2"]);
+        principal.SetClaims("TYPE", ImmutableArray.Create("value1", "value2"));
 
         // Assert
-        Assert.Equal<string>(["value1", "value2"], principal.GetClaims("type"));
+        Assert.Equal<string>(ImmutableArray.Create("value1", "value2"), principal.GetClaims("type"));
     }
 
     [Fact]
@@ -3745,7 +3745,7 @@ public class OpenIddictExtensionsTests
         identity.AddClaim("type", "value");
 
         // Act
-        identity.SetClaims("type", []);
+        identity.SetClaims("type", ImmutableArray<string>.Empty);
 
         // Assert
         Assert.Empty(identity.GetClaims("type"));
@@ -3759,7 +3759,7 @@ public class OpenIddictExtensionsTests
         principal.AddClaim("type", "value");
 
         // Act
-        principal.SetClaims("type", []);
+        principal.SetClaims("type", ImmutableArray<string>.Empty);
 
         // Assert
         Assert.Empty(principal.GetClaims("type"));

test/OpenIddict.Server.IntegrationTests/OpenIddictServerIntegrationTests.Authentication.cs

@@ -1202,7 +1202,7 @@ public abstract partial class OpenIddictServerIntegrationTests
                 .ReturnsAsync(true);
 
             mock.Setup(manager => manager.GetPermissionsAsync(application, It.IsAny<CancellationToken>()))
-                .ReturnsAsync([]);
+                .ReturnsAsync(ImmutableArray<string>.Empty);
         });
 
         await using var server = await CreateServerAsync(options =>
@@ -1378,7 +1378,7 @@ public abstract partial class OpenIddictServerIntegrationTests
                 .ReturnsAsync(true);
 
             mock.Setup(manager => manager.GetPermissionsAsync(application, It.IsAny<CancellationToken>()))
-                .ReturnsAsync([]);
+                .ReturnsAsync(ImmutableArray<string>.Empty);
         });
 
         await using var server = await CreateServerAsync(options =>
@@ -1425,7 +1425,7 @@ public abstract partial class OpenIddictServerIntegrationTests
                 .ReturnsAsync(application);
 
             mock.Setup(manager => manager.GetPermissionsAsync(application, It.IsAny<CancellationToken>()))
-                .ReturnsAsync(["rst:" + type]);
+                .ReturnsAsync(ImmutableArray.Create("rst:" + type));
 
             mock.Setup(manager => manager.ValidateRedirectUriAsync(application, "http://www.fabrikam.com/path", It.IsAny<CancellationToken>()))
                 .ReturnsAsync(true);

test/OpenIddict.Server.IntegrationTests/OpenIddictServerIntegrationTests.Exchange.cs

@@ -2816,7 +2816,7 @@ public abstract partial class OpenIddictServerIntegrationTests
     public async Task HandleTokenRequest_RevokesTokensWhenAuthorizationCodeIsAlreadyRedeemed()
     {
         // Arrange
-        ImmutableArray<OpenIddictToken> tokens = [new(), new(), new()];
+        var tokens = ImmutableArray.Create(new OpenIddictToken(), new OpenIddictToken(), new OpenIddictToken());
 
         var manager = CreateTokenManager(mock =>
         {
@@ -2915,7 +2915,7 @@ public abstract partial class OpenIddictServerIntegrationTests
     public async Task HandleTokenRequest_RevokesTokensWhenRefreshTokenIsAlreadyRedeemedAndLeewayIsNull()
     {
         // Arrange
-        ImmutableArray<OpenIddictToken> tokens = [new(), new(), new()];
+        var tokens = ImmutableArray.Create(new OpenIddictToken(), new OpenIddictToken(), new OpenIddictToken());
 
         var manager = CreateTokenManager(mock =>
         {
@@ -3006,7 +3006,7 @@ public abstract partial class OpenIddictServerIntegrationTests
     public async Task HandleTokenRequest_RevokesTokensWhenRefreshTokenIsAlreadyRedeemedAndCannotBeReused()
     {
         // Arrange
-        ImmutableArray<OpenIddictToken> tokens = [new(), new(), new()];
+        var tokens = ImmutableArray.Create(new OpenIddictToken(), new OpenIddictToken(), new OpenIddictToken());
 
         var manager = CreateTokenManager(mock =>
         {
@@ -3097,7 +3097,7 @@ public abstract partial class OpenIddictServerIntegrationTests
     public async Task HandleTokenRequest_DoesNotRevokeTokensWhenRefreshTokenIsAlreadyRedeemedAndCanBeReused()
     {
         // Arrange
-        ImmutableArray<OpenIddictToken> tokens = [new(), new(), new()];
+        var tokens = ImmutableArray.Create(new OpenIddictToken(), new OpenIddictToken(), new OpenIddictToken());
 
         var manager = CreateTokenManager(mock =>
         {

test/OpenIddict.Server.IntegrationTests/OpenIddictServerIntegrationTests.Protection.cs

@@ -6,6 +6,7 @@
  * the license and the contributors participating to this project.
  */
 
+using System.Collections.Immutable;
 using System.Security.Claims;
 using Xunit;
 using static OpenIddict.Server.OpenIddictServerEvents;
@@ -296,7 +297,7 @@ public abstract partial class OpenIddictServerIntegrationTests
                     context.Principal = new ClaimsPrincipal(new ClaimsIdentity("Bearer"))
                         .SetTokenType(TokenTypeHints.AccessToken)
                         .SetClaim(Claims.Subject, "Bob le Magnifique")
-                        .SetClaims(Claims.Audience, ["Fabrikam", "Contoso"]);
+                        .SetClaims(Claims.Audience, ImmutableArray.Create("Fabrikam", "Contoso"));
 
                     return default;
                 });
@@ -346,7 +347,7 @@ public abstract partial class OpenIddictServerIntegrationTests
                     context.Principal = new ClaimsPrincipal(new ClaimsIdentity("Bearer"))
                         .SetTokenType(TokenTypeHints.AccessToken)
                         .SetClaim(Claims.Subject, "Bob le Magnifique")
-                        .SetClaims(Claims.Scope, [Scopes.OpenId, Scopes.Profile]);
+                        .SetClaims(Claims.Scope, ImmutableArray.Create(Scopes.OpenId, Scopes.Profile));
 
                     return default;
                 });
@@ -444,7 +445,7 @@ public abstract partial class OpenIddictServerIntegrationTests
                     context.Principal = new ClaimsPrincipal(new ClaimsIdentity("Bearer"))
                         .SetTokenType(TokenTypeHints.AccessToken)
                         .SetClaim(Claims.Subject, "Bob le Magnifique")
-                        .SetClaims(Claims.Scope, [Scopes.OpenId, Scopes.Profile]);
+                        .SetClaims(Claims.Scope, ImmutableArray.Create(Scopes.OpenId, Scopes.Profile));
 
                     return default;
                 });