LoadContext strikes again

loadcontextredux.txt

A (project) -> B (package)
     (build)-> CustomCompiler (project) (build)-> FSharpCompiler (project) -> System.Runtime (package)

public interface ILoadContextProvider {
    IAssemblyLoadContext GetLoadContext(Project project, FrameworkName targetFramework);
}

var loadContextProvider = ...

Compile(A)
     var compiler = GetCompiler(A)
          var blc = loadContextProvider.GetLoadContext(A, framework)
          blc.Load(CustomCompiler)
          var compiler = GetCompiler(CustomCompiler)
               var blc2 = loadContextProvider.GetLoadContext(CustomCompiler, framework)
               blc2.Load(FSharpCompiler)
               var compiler = GetCompiler(FSharpCompiler)
                    var blc3 = loadContextProvider.GetLoadContext(FSharpCompiler, framework)
                    blc3.Load(Microsoft.Dnx.Compilation.CSharp)
                    blc3.Load(System.Runtime)
     var a = compiler.Compile(A, GetReferences(A))