Microsoft.CodeAnalysis.ExpressionEvaluator.EvaluationContextBase.CompileAssignment(System.String, System.String, System.Collections.Immutable.ImmutableArray<Microsoft.CodeAnalysis.ExpressionEvaluator.Alias>, Microsoft.CodeAnalysis.DiagnosticBag, out Microsoft.CodeAnalysis.ExpressionEvaluator.ResultProperties, Microsoft.CodeAnalysis.CodeGen.CompilationTestData)