Default.

Reads a DiffGram, applying changes from the DiffGram to the System.Data.DataSet. The semantics are identical to those of a DataSet.Merge(DataSet) operation. As with the DataSet.Merge(DataSet) operation, DataRow.RowState values are preserved. Input to DataSet.ReadXml(System.Xml.XmlReader) with DiffGrams should only be obtained using the output from DataSet.WriteXml(System.IO.Stream) as a DiffGram.

Reads XML fragments, such as those generated by executing FOR XML queries, against an instance of SQL Server. When System.Data.XmlReadMode is set to Fragment, the default namespace is read as the inline schema.

Ignores any inline schema and reads data into the existing System.Data.DataSet schema. If any data does not match the existing schema, it is discarded (including data from differing namespaces defined for the System.Data.DataSet). If the data is a DiffGram, IgnoreSchema has the same functionality as DiffGram.

Ignores any inline schema, infers schema from the data and loads the data. If the System.Data.DataSet already contains a schema, the current schema is extended by adding new tables or adding columns to existing tables. An exception is thrown if the inferred table already exists but with a different namespace, or if any of the inferred columns conflict with existing columns.

Ignores any inline schema, infers a strongly typed schema from the data, and loads the data. If the type cannot be inferred from the data, it is interpreted as string data. If the System.Data.DataSet already contains a schema, the current schema is extended, either by adding new tables or by adding columns to existing tables. An exception is thrown if the inferred table already exists but with a different namespace, or if any of the inferred columns conflict with existing columns.

Reads any inline schema and loads the data. If the System.Data.DataSet already contains schema, new tables may be added to the schema, but an exception is thrown if any tables in the inline schema already exist in the System.Data.DataSet.