updated codebase to work with preview8 of dotnetcore

Author: Terry Kernan

src/blazor/BlazorChatApp/BlazorChatApp.csproj

@@ -7,9 +7,10 @@
  </PropertyGroup>
 
  <ItemGroup>
- <PackageReference Include="Microsoft.AspNetCore.Blazor" Version="3.0.0-preview7.19365.7" />
- <PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="3.0.0-preview7.19365.7" PrivateAssets="all" />
- <PackageReference Include="Microsoft.AspNetCore.Blazor.DevServer" Version="3.0.0-preview7.19365.7" PrivateAssets="all" />
+ <PackageReference Include="Microsoft.AspNetCore.Blazor" Version="3.0.0-preview8.19405.7" />
+ <PackageReference Include="Microsoft.AspNetCore.Blazor.Build" Version="3.0.0-preview8.19405.7" PrivateAssets="all" />
+ <PackageReference Include="Microsoft.AspNetCore.Blazor.DevServer" Version="3.0.0-preview8.19405.7" PrivateAssets="all" />
+ <PackageReference Include="Microsoft.AspNetCore.Blazor.HttpClient" Version="3.0.0-preview8.19405.7" PrivateAssets="all" />
  </ItemGroup>
 
 </Project>

src/blazor/BlazorChatApp/Shared/Chat.razor

@@ -35,7 +35,7 @@
  private ChatMessage[] _chatMessages = new ChatMessage[0];
  private Timer _timer = new Timer(1000);
 
- protected override void OnInit()
+ protected override void OnInitialized()
  {
  _timer.Elapsed += async (sender, args) => await TickAsync();
  _timer.Start();

src/blazor/BlazorChatApp/_Imports.razor

@@ -1,7 +1,6 @@
 @using System.Linq
 @using System.Net.Http
 @using Microsoft.AspNetCore.Components.Forms
-@using Microsoft.AspNetCore.Components.Layouts
 @using Microsoft.AspNetCore.Components.Routing
 @using Microsoft.JSInterop
 @using BlazorChatApp