What is the Difference between XmlDocument and XmlDataDocument?
463. Explain what a DiffGram is, and a good use for one? A DiffGram is an XML format that is used to identify current and original versions of data elements. When sending and retrieving a DataSet from an XML Web service, the DiffGram format is implicitly used. 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. DiffGram Format The DiffGram format is divided into three sections: the current data, the original (or “before”) data, and an errors section, as shown in the following example. The DiffGram format consists of the following blocks of data: DataInstance> The name of this element, DataInstance, is used for e
