Convertion of Data Source in to a Particular Data Types

Hi, Sorry that I was not clear in my last post. The thing is I am making a dataBound custom server control. For this, I am taking an object type DataSource property. I need values from dataSouce which will be provided by user. But as user can choose any dataSource(arrays,arraylist,dataTable,dataSet,dataView etc.),So I want to convert all datasource in to a particular type e.g. dataSet. If that will happen then my code will be simpler.I need to write code only for dataSet. Can any one suggest the idea. I think, I should convert dataSources in to IEnumerable type and there after I can get values.But I don't know how to do that?

i am not clear about what u said , can u make it clear