I have 2 DataSources, each of them have some different columns in output results and some identical columns.

I try to bing UltraGrid to DataSources:

if(isRegistrator)

   GVOrdersInput.DataSource = viewFirstBindingSource;

else

   GVOrdersInput.DataSource = viewSecondBindingSource;

I received an exception "Key already exist" and thats all... How I can bind my UltraGrid to 2 datasources &