Creating Generic Component in silverlight to accept any type of collection

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Silverlight

Hi,

I am trying to create one generic component that will have autocomplete box with search button ,when i dont know the keyword to search in autocomplete i can use that search button so that one child window will open and it will list the records so that i will choose the reqired one so that it will come in autocomplet box ,

this usercontrol will accept the generic collection of specific type lets say "X" ,the autocomplete and datagrid is working under this X type only ,
but the problem here is i always need to create the collection based on X type to supply for usercontrol

but i need to make this usercontrol to get any type of collection instead of sticking with X type ,based on the type the autocomplete and datagrid need to work

Waiting for the solution

Thanks in advance