"field used as type" build error DataSet for SQL Server connection

Question

i have a "field used as type" build error and it says 

Error1'WindowsFormsApplication1.update_html1.test_db_DataSet' is a 'field' but is used like a 'type'

but as far as i can see form the .designer.cs file and .cs files it is actualy a type ... any ideas????


if anyone needs any details to shed light on this i would only be to happy to give you them.