<PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.14.0" />

Unhandled exception. Microsoft.Build.Exceptions.InvalidProjectFileException: No file format header found.  /home/rishad/OrHome/csharp/projects/orleans/Orleans.slnx
   at Microsoft.Build.Shared.ProjectFileErrorUtilities.VerifyThrowInvalidProjectFile(Boolean condition, String errorSubCategoryResourceName, BuildEventFileInfo projectFile, Exception innerException, String resourceName, Object[] args)
   at Microsoft.Build.Shared.ProjectFileErrorUtilities.VerifyThrowInvalidProjectFile(Boolean condition, String errorSubCategoryResourceName, BuildEventFileInfo projectFile, String resourceName, Object[] args)
   at Microsoft.Build.Construction.SolutionFile.ParseFileHeader()
   at Microsoft.Build.Construction.SolutionFile.ParseSolution()
   at Microsoft.Build.Construction.SolutionFile.ParseSolutionFile()
   at Microsoft.Build.Construction.SolutionFile.Parse(String solutionFile)
   at Microsoft.CodeAnalysis.MSBuild.MSBuildProjectLoader.LoadSolutionInfoAsync(String solutionFilePath, IProgress`1 progress, ILogger msbuildLogger, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.MSBuild.MSBuildWorkspace.OpenSolutionAsync(String solutionFilePath, ILogger msbuildLogger, IProgress`1 progress, CancellationToken cancellationToken)