DRAG DROP
There is MS Visual Studio 2010 and MS .NET Framework 4 application PassGuideApp.
There is a web page PassGuideWP.
On PassGuideWP is a Gridview control PassGuideGW.
PassGuideGW displays employee information in a table.
PassGuideGW uses a Data Table as data source.
A Table Adapter is used for the Data Table.
How can you make sure that new employees data is retrieved whenever PassGuideWP is
refreshed while keeping current employee data?
Answer: 
Explanation:
See: http://msdn.microsoft.com/en-us/library/bz9tthwx.aspx
By default, every time you execute a query to fill a TableAdapter’s data table, the data is cleared and only the results of the query are loaded into the table. Set the TableAdapter’s ClearBeforeFill property to false if you want to add or merge the data returned from a query to the existing data in a data table.
TableAdapter.ClearBeforeFill – Determines whether a data table is emptied before you call one of the Fill methods.
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