| Author: Hubli Sunil 18 May 2008 | Member Level: Diamond | Rating:  Points: 2 |
refer this
http://msdn.microsoft.com/en-us/library/ms172088(VS.71).aspx
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| Author: Sridhar R 16 Jul 2008 | Member Level: Diamond | Rating: Points: 6 |
A DiffGram is an XML format that identifies current and original versions of data elements. The DataSet uses the DiffGram format to load and persist its contents, and to serialize its contents for transport across a network connection. When a DataSet is written as a DiffGram, it populates the DiffGram with all the necessary information to accurately recreate the contents, though not the schema, of the DataSet, including column values from both the Original and Current row versions, row error information, and row order.
When sending and retrieving a DataSet from an XML Web service, the DiffGram format is implicitly used. Additionally, when loading the contents of a DataSet from XML using the ReadXml method, or when writing the contents of a DataSet in XML using the WriteXml method, you can specify that the contents be read or written as a DiffGram. For more information, see Loading a DataSet from XML (ADO.NET) and Writing DataSet Contents as XML Data (ADO.NET).
While the DiffGram format is primarily used by the .NET Framework as a serialization format for the contents of a DataSet, you can also use DiffGrams to modify data in tables in a Microsoft SQL Server database
For More Idea......
http://msdn.microsoft.com/en-us/library/ms172088.aspx
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