With block and MemberAccessExpressionSyntax

Question

string code =
                @"Public Class Sample
                    Public Sub Foo()
                        Dim tb = New System.Web.UI.WebControls.TextBox()
                        With tb
                            .Text = ""
                        End With
                    End Sub
                End Class";

            var tree = SyntaxTree.ParseCompilationUnit(code);
            var compilation = Compilation.Create("Test")
                             .AddReferences(new Roslyn.Compilers.AssemblyNameReference("mscorlib"))
                             .AddSyntaxTrees(tree);
            var model = compilation.GetSemanticModel(tree);

            var invocations = tree.GetRoot().DescendantNodes().OfType<MemberAccessExpressionSyntax>();
            foreach (var invocation in invocations)
            {
                var info = model.GetSymbolInfo(invocation).Symbol;
            }

model.GetSymbolInfo(invocation).Symbol returns null. is it possible to find a type which member is being accessed within a With block?

Answer 1

I believe the reason for getting null is that your compilation is missing a reference to "System.Web".

Try adding

new Roslyn.Compilers.AssemblyNameReference("System.Web")) 

to the compilation and you should get a property symbol instead of null.

Thanks,
Mohammed

Answer 2

no, it doesn't work. i have updated my example to make it more straightforward

http://oi46.tinypic.com/hv1ojm.jpg