SQL Server返回带有XML数据类型的Select语句，并将其转换为C＃，ASP.Net中的DataSet

In my database table, I have a column name 'SectionDatatable' which are in XML datatype. In my C# code, after I have connection to database to my database and I make a query to get SectionDatatablewhich is XML format in my database, UserDefinedSectionData. I need to convert the 'SectionDatatable' in XML Datatype and convert it into DataSet, how can I do it. I have stuck for 1 day, the following is my code.In my database table, I have a column name 'Sec