1 // CS4015: `C.SynchronousCall(int)': Async methods cannot use `MethodImplOptions.Synchronized'
4 using System.Threading.Tasks;
5 using System.Runtime.CompilerServices;
9 [MethodImplAttribute(MethodImplOptions.Synchronized)]
10 public static async Task SynchronousCall (int arg)
12 await Task.FromResult (1);