1 // CS1644: Feature `asynchronous functions' cannot be used because it is not part of the C# 4.0 language specification
2 // Line: 9
3 // Compiler options: -langversion:4
4
5 using System;
6
7 class C
8 {
Foo()9 public async void Foo ()
10 {
11 }
12 }
13
14