ObjectDataSource TypeName and Nested Classes

When trying to use an ObjectDataSource with an method from my data access layer, I kept getting this error:



The type specified in the TypeName property of ObjectDataSource 'myODS' could not be found.



Long story short, the object I was using was actually a nested class. Even though you write you code like this:

MyNamespace.MyClass.NestedClass.Action();

The actual fully qualified type name for an ObjectDataSource TypeName will be "MyNamespace.MyClass+NestedClass" with a SelectMethod of "Action". If you visit this MSDN page and look down to where it talks about delimiters, you will see that nested classes use a plus as a delimiter for some reason instead of the usual dot.