classes in asp.net using c#

 protected void Btn_Search_Click(object sender, EventArgs e)
    {
      string Sql_Txt = " Select * from Employee_Table where Emp_Name like                                                    '"+Txt_Emp_Name.text+"'";
            Grv_Employee.DataSource = con.SqlExec(Sql_Txt, "Emp_Info_Tbl");
            Grv_Employee.DataBind();
}
the class code 
public static class Connection
{
public static SqlConnection SQLCS = new SqlConnection(MyConnStr);
public static SqlDataAdapter SQLDA = new SqlDataAdapter();
public static SqlCommand SQLCMD = new SqlCommand();
public static DataTable SqlExec(string SqlText, string TblName)
    {
            SQLDA.SelectCommand = new SqlCommand(SqlText, SQLCS);
            SQLDA.Fill(SQLDS, TblName);
            SQLCS.Close();
        
        return SQLDS.Tables[TblName];
    }
}