Index: C:/boo-ssh/src/Boo.Lang.Compiler/Steps/ProcessMethodBodies.cs
===================================================================
--- C:/boo-ssh/src/Boo.Lang.Compiler/Steps/ProcessMethodBodies.cs	(revision 2036)
+++ C:/boo-ssh/src/Boo.Lang.Compiler/Steps/ProcessMethodBodies.cs	(working copy)
@@ -2023,6 +2023,18 @@
 						}
 					}
 				}
+				foreach (IEntity entity in toType.GetMembers())
+				{
+					if (EntityType.Method == entity.EntityType &&
+						name == entity.Name)
+					{
+						IMethod method = (IMethod)entity;
+						if (IsConversionOperator(method, fromType, toType))
+						{
+							return method;
+						}
+					}
+				}
 				fromType = fromType.BaseType;
 				if (null == fromType) break;
 			}
Index: C:/boo-ssh/tests/testcases/errors/BCE0022-10.boo
===================================================================
--- C:/boo-ssh/tests/testcases/errors/BCE0022-10.boo	(revision 0)
+++ C:/boo-ssh/tests/testcases/errors/BCE0022-10.boo	(revision 0)
@@ -0,0 +1,18 @@
+"""
+BCE0022-10.boo(13,20): BCE0022: Cannot convert 'System.IntPtr' to 'System.Runtime.InteropServices.GCHandle'.
+"""
+import System
+import System.Runtime.InteropServices
+
+obj = object()
+
+//succeeds:
+ptr as IntPtr = cast(IntPtr, GCHandle.Alloc( obj ))
+
+//should fail because op_Explicit requires explicit cast:
+gch2 as GCHandle = ptr
+
+gch2.Free()
+
+print "test should have failed"
+
Index: C:/boo-ssh/tests/testcases/regression/BOO-651-1.boo
===================================================================
--- C:/boo-ssh/tests/testcases/regression/BOO-651-1.boo	(revision 0)
+++ C:/boo-ssh/tests/testcases/regression/BOO-651-1.boo	(revision 0)
@@ -0,0 +1,22 @@
+"""
+test passed
+"""
+import System
+import System.Runtime.InteropServices
+
+obj = object()
+
+//succeeds:
+ptr as IntPtr = cast(IntPtr, GCHandle.Alloc( obj ))
+
+//previously failed:
+gch = cast(GCHandle, ptr)
+
+//Should fail because op_Explicit requires explicit cast:
+//Tested in ../errors/BCE0022-10.boo
+//gch2 as GCHandle = ptr
+
+gch.Free()
+
+print "test passed"
+