C# Tip Article

When I tried to build a C# project, I ran into the following error.

The "GenerateResource" task failed unexpectedly.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Microsoft.Build.Tasks.ResGenDependencies.GetResXFileInfo(String resxFile)
   at Microsoft.Build.Tasks.GenerateResource.ShouldRebuildResgenOutputFile(String sourceFilePath, String outputFilePath)
   at Microsoft.Build.Tasks.GenerateResource.GetResourcesToProcess(List`1& inputsToProcess, List`1& outputsToProcess, List`1& cachedOutputFiles)
   at Microsoft.Build.Tasks.GenerateResource.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.d__26.MoveNext()	MyApp

Without paying attention too much, I ran Clean Build and then Rebuild Project. But it surprisingly didn't work.

Final solution was to remove .\obj folder and rebuild the project. Worked great!