Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/gtest-159.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+
+public class App {
+  public static void Main() {
+    Dictionary<string, int> values = new Dictionary<string, int>();
+    values["one"] = 1; values["two"] = 2;
+
+    foreach (string key in values.Keys) {
+      System.Console.WriteLine("key: {0}", key);
+    }
+  }
+}