vscode-csharp: VS Code shows invalid intellisense errors while working with Blazor

Environment data

dotnet --info .NET SDK (reflecting any global.json): Version: 5.0.301 Commit: ef17233f86

Runtime Environment: OS Name: Windows OS Version: 10.0.19043 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\5.0.301\

Host (useful for support): Version: 5.0.7 Commit: 556582d964

.NET SDKs installed: 5.0.201 [C:\Program Files\dotnet\sdk] 5.0.203 [C:\Program Files\dotnet\sdk] 5.0.301 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.All 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.15 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.28 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.15 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.15 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

VS Code version: 1.57.0 (user setup)

C# Extension version: The version of ms-dotnettools.csharp is v1.23.12

OmniSharp log

Steps to reproduce

Open a shell and write dotnet new blazorwasm -o merhaba cd .\merhaba
code .

Expected behavior

Vs Code should recognize merhaba.Shared namespace. VS Code should recognize App class.

Actual behavior

VS Code shows invalid errors in _Import.razor and Program.cs *** See the attached screen captures ***

Additional problems from one of other project.

Please note that there is no problem with building and runnig source code.