Hello. I decided to create my own DocumentPane based on RadDocumentPane. Then I tried to save and load RadDocking layout. Saving layout operation works good, but loading layout operation gives me a error:
​Specified argument was out of the range of valid values.
Parameter name: elementTypeName
How can I load layout with my custom documentPanes?
​Specified argument was out of the range of valid values.
Parameter name: elementTypeName
How can I load layout with my custom documentPanes?