Just a minor allocation improvement.

backend/src/Squidex.Infrastructure/Queries/ClrValue.cs

@@ -16,6 +16,8 @@ namespace Squidex.Infrastructure.Queries
 {
     public sealed class ClrValue
     {
+        private static readonly Func<object?, string> ToStringDelegate = ToString;
+
         public static readonly ClrValue Null = new ClrValue(null, ClrValueType.Null, false);
 
         public object? Value { get; }
@@ -121,7 +123,7 @@ namespace Squidex.Infrastructure.Queries
         {
             if (Value is IList list)
             {
-                return $"[{string.Join(", ", list.OfType<object>().Select(ToString).ToArray())}]";
+                return $"[{string.Join(", ", list.OfType<object>().Select(ToStringDelegate).ToArray())}]";
             }
 
             return ToString(Value);

backend/src/Squidex.Infrastructure/Validation/ValidationException.cs

@@ -16,6 +16,7 @@ namespace Squidex.Infrastructure.Validation
     [Serializable]
     public class ValidationException : DomainException
     {
+        private static readonly char[] TrimChars = { ' ', '.', ':' };
         private static readonly List<ValidationError> FallbackErrors = new List<ValidationError>();
         private readonly IReadOnlyList<ValidationError> errors;
 
@@ -69,7 +70,7 @@ namespace Squidex.Infrastructure.Validation
         {
             var sb = new StringBuilder();
 
-            sb.Append(summary.TrimEnd(' ', '.', ':'));
+            sb.Append(summary.TrimEnd(TrimChars));
 
             if (errors?.Count > 0)
             {