Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-async-56.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+class Test
+{
+	public static int Main ()
+	{
+		Task<int> t = TestMethod ();
+
+		try {
+			t.Start ();
+			return 1;
+		} catch (InvalidOperationException) {
+		}
+
+		try {
+			t.RunSynchronously ();
+			return 2;
+		} catch (InvalidOperationException) {
+		}
+
+		Console.WriteLine ("ok");
+		return 0;
+	}
+
+	async static Task<int> TestMethod ()
+	{
+		await Task.Delay (100000);
+		return 1;
+	}
+}