C# Linq 转DataTable

DataRow dr = this.gvRole.GetFocusedDataRow();

            if(dr != null)

            {

                varvAUTHORITY = from q indt.AsEnumerable()

                                 where q.Field<string>("ID") == dr["ID"].ToString()

                                 select q;

 

                DataTabledtAut = vAUTHORITY.CopyToDataTable();

}