Save Changes of DataGridView

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C#

C#4.0

How to save Dataset changes (mydataset.GetChanges) to
my sqladapter like this:

S  SqlConnection con = new SqlConnection(_lg.connectionstring);
            con.Open();
            SqlDataAdapter mySqlDataAdapter = new SqlDataAdapter(_commandstring, con);
            this.myDataSet.Clear();
            mySqlDataAdapter.Fill(myDataSet, "MyTable");
            try
            {
                DataSet mychangeDataSet = this.myDataSet.GetChanges();
                if (mychangeDataSet != null)
                {
                     mySqlDataAdapter . Update(mychangeDataSet.Tables ["MyTable"]);
                   this.myDataSet.AcceptChanges();
                   myDataSet.Clear();
                   mySqlDataAdapter.Fill(this.myDataSet, "MyTable");
                   mydatagridview.DataSource = myDataSet.Tables["MyTable"].DefaultView;
                }
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.ToString ());
            }

This work properly for oledb adapter how to use it for sql adapter?