>>Compiles and runs for me. What did the IDE say ?
>
>The following code:
>
>

>' Create the operation context scope needed to add headers
>Using loSOAPSVC.oOperationContextScope = New System.ServiceModel.OperationContextScope(loMyService.InnerChannel)
>
>End Using
>

>
>...would cause the designer to report this:
>
>"Operator '=' is not defined for types 'System.ServiceModel.OperationContextScope' and 'System.ServiceModel.OperationContextScope'."

Interesting. It does work in C# - I just ran my code thru a converter. TBH I don't think it should work in C# either - the docs for 'using' state:
"Within the using block, the object is read-only and cannot be modified or reassigned." But this is allowed:

using (mySvc.Something = new OperationContext())
                {
                    mySvc.Something = new OperationContext();
                };

whereas the following gives the expected error 'Readonly local variable cannot be used in any execution path':

using (var test = new OperationContext())
                {
                    test = new OperationContext();
                };

Seems to me C# is letting an invalid construct slip past?