Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs1640.cs

@@ -0,0 +1,15 @@
+// CS1640: foreach statement cannot operate on variables of type `T' because it contains multiple implementation of `System.Collections.Generic.IEnumerable<T>'. Try casting to a specific implementation
+// Line: 11
+
+using System.Collections.Generic;
+
+public class C
+{
+	public static void Test<T>(T t) 
+		where T: IEnumerable<string>, IEnumerable<int>
+	{
+		foreach (int i in t)
+		{
+		}
+	}
+}