Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-linq-28.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Linq;
+
+class C
+{
+	public static int Main ()
+	{
+		var r = from m in "ab"
+				let n = from n in "xyz" select n
+				select n;
+		
+		int counter = 0;
+		foreach (var a in r) {
+			foreach (var b in a) {
+				Console.WriteLine (b);
+				counter++;
+			}
+		}
+		
+		if (counter != 6)
+			return 1;
+		
+		return 0;
+	}
+}