1 files changed, 25 insertions, 0 deletions
diff --git a/mcs/errors/cs0172.cs b/mcs/errors/cs0172.cs
new file mode 100755
index 00000000000..2ae816f8eb5
--- /dev/null
+++ b/mcs/errors/cs0172.cs
@@ -0,0 +1,25 @@
+class X {
+	public static implicit operator X (Y y)
+	{
+		return null;
+	}
+}
+
+class Y {
+	public static implicit operator Y (X x)
+	{
+		return null;
+	}
+}
+
+class Z
+{
+	static void Main ()
+	{
+		X x = new X ();
+		Y y = new Y ();
+
+		object d = (x == x) ? x : y;
+	}
+	
+}