After updating VS 2019 16.8.2 There will be an error on compilation on any project:

dot net --version : 5.0.100

Severity Code Description Project File Line Suppression State

Error MSB4018 The "RazorGenerate" task failed unexpectedly.
System.InvalidOperationException: DOTNET_HOST_PATH is not set at Microsoft.AspNetCore.Razor.Tasks.DotNetToolTask.get_DotNetPath()
at Microsoft.AspNetCore.Razor.Tasks.DotNetToolTask.GenerateFullPathToTool()
at Microsoft.Build.Utilities.ToolTask.ComputePathToTool() a...

You can solve the issue by adding below lines in web.config file.

 <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral"/>
        <bindingRedirect oldVersion="0.0.0.0-8.0.0.0" newVersion="8.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>