title: "Cannot change DataType of a column once it has data" error in Visual Studio 2005 DataSet Designer
body: <p>I've got a DataSet in VisualStudio 2005.  I need to change the datatype of a column in one of the datatables from <code>System.Int32</code> to <code>System.Decimal</code>.  When I try to change the datatype in the <code>DataSet Designer</code> I receive the following error:</p>
  
  <blockquote>
    <p>Property value is not valid.  Cannot change DataType of a column once
    it has data.</p>
  </blockquote>
  
  <p>From my understanding, this should be changing the datatype in the schema for the DataSet.  I don't see how there can be any data to cause this error.</p>
  
  <p>Does any one have any ideas?</p>