>In my app when the user clicks a contact name I get a reader of the contact data and use it to load the data into the UI. If I click around on multiple contacts very fast I get
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>"There is already an open DataReader associated with this Command which must be closed first." in my app.
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>I have DataReader.Close() in all the right places, but it's possible to initiate another call to the ExecuteReader before the previous reader is closed.
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>I tried Thread.Sleep(15), but it's still possible to click from one contact to another before the previous reader is done.
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>Anyone?
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>[UPDATE] - Now I'm not sure why I'm seeing this, because I'm clicking from one contact to another slowely and it still errors.

Not sure it's relevant but google the use of 'MultipleActiveResultSets' in the connection string......