Imported Upstream version 3.8.0

Former-commit-id: 6a76a29bd07d86e57c6c8da45c65ed5447d38a61

mcs/errors/cs1650-3.cs

@@ -0,0 +1,19 @@
+// CS1650: Fields of static readonly field `C<T>.t' cannot be assigned to (except in a static constructor or a variable initializer)
+// Line: 17
+
+using System;
+
+interface I
+{
+	int X { get; set; }
+}
+
+class C<T> where T : struct, I
+{
+	static readonly T t;
+
+	public static void Foo ()
+	{
+		t.X = 42;
+	}
+}