Resolve Windows Docker Build "C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018: System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {7Bxxxxxxxxxxxx} failed due to the following error: 80040154 Class not registered (0x80040154 (REGDB_E_CLASSNOTREG))"

 Building .NET 6 project with Resource files is running into build issue as shown below, when building with .NET 6 nanoserver build images.

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018: The "GenerateResource" task failed unexpectedly. [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018: System.Runtime.InteropServices.COMException (0x80040154): Retrieving the COM class factory for component with CLSID {7Bxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx} failed due to the following error: 80040154 Class not registered (0x80040154 (REGDB_E_CLASSNOTREG)). [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018:    at System.RuntimeTypeHandle.AllocateComObject(Void* pClassFactory) [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018:    at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean wrapExceptions) [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018:    at Microsoft.Build.Tasks.GenerateResource.IsDangerous(String filename) [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018:    at Microsoft.Build.Tasks.GenerateResource.Execute() [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [C:\src\Demo\Demo.csproj]

C:\Program Files\dotnet\sdk\6.0.407\Microsoft.Common.CurrentVersion.targets(3262,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) [C:\src\Demo\Demo.csproj]

This was happening when building with sdk 6.0 nanoserver image.

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build

To fix the issue we need to use 

FROM mcr.microsoft.com/dotnet/sdk:6.0-windowsservercore-ltsc2019 AS build

With server core image with .NET SDK 6.0 the build works fine.

As described in the GitHub issue here nanoserver .NET 6 docker image no longer contains the C:\Windows\System32\urlmon.dll cause this issue.