Inject in the code behind.

modules/identity/src/Volo.Abp.Identity.Blazor/Pages/Identity/RoleManagement.razor

@@ -5,9 +5,7 @@
 @using Microsoft.Extensions.Localization
 @using Volo.Abp.Application.Dtos
 @using Volo.Abp.Identity.Localization
-@inject IIdentityRoleAppService RoleAppService
 @inject IStringLocalizer<IdentityResource> L
-@inject IUiMessageService UiMessageService
 @* ************************* PAGE HEADER ************************* *@
 <Row>
     <Column ColumnSize="ColumnSize.Is6">

modules/identity/src/Volo.Abp.Identity.Blazor/Pages/Identity/RoleManagement.razor.cs

@@ -4,13 +4,18 @@ using System.Linq;
 using System.Threading.Tasks;
 using Blazorise;
 using Blazorise.DataGrid;
+using Microsoft.AspNetCore.Components;
 using Volo.Abp.ObjectExtending;
 using Volo.Abp.Application.Dtos;
+using Volo.Abp.AspNetCore.Components.WebAssembly;
 
 namespace Volo.Abp.Identity.Blazor.Pages.Identity
 {
     public partial class RoleManagement
     {
+        [Inject] private IIdentityRoleAppService RoleAppService { get; set; }
+        [Inject] private IUiMessageService UiMessageService { get; set; }
+
         private int _currentPage;
         private string _currentSorting;
         private int? _totalCount;

modules/identity/src/Volo.Abp.Identity.Blazor/_Imports.razor

@@ -1,5 +1,5 @@
 @using Microsoft.AspNetCore.Components.Web
 @using Volo.Abp.AspNetCore.Components.WebAssembly
-@using Volo.Abp.BlazoriseLib
+@using Volo.Abp.BlazoriseUI
 @using Blazorise
 @using Blazorise.DataGrid