Demo project showing compilation issue under C# Bazel rules

To reproduce the issue: 0. Clone this repo.

1. Open BazelCompileIssue.sln in Visual Studio.
2. Build the project and verify that it compiles.
3. At a Developer Command Prompt for Visual Studio, in the root directory of the cloned repo, execute bazel build //BazelCompileIssue:CompileIssue.

While the code builds successfully in Visual Studio, it fails to build on the command line. The types being referenced exist as part of the core library (mscorlib), so it should not require any other references to build properly.