Imported Upstream version 6.0.0.172

Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd

mcs/class/corlib/corefx/MonoLinqHelper.cs

@@ -0,0 +1,16 @@
+// Helper class providing missing System.Linq functionality
+// for CoreFX code
+
+using System;
+using System.Collections.Generic;
+
+namespace System.IO
+{
+	internal static class MonoLinqHelper
+	{
+		public static T[] ToArray<T>(this IEnumerable<T> source)
+		{
+			return EnumerableHelpers.ToArray<T> (source);
+		}
+	}
+}