//Method to Insert Data in Database
        public bool Insert(CustomerClass c)
        {
            bool          isSucess = false;
            SqlConnection conn     = new SqlConnection(myconnstrng);

            try
            {
                string     sql = "INSERT INTO tbl_Customer(Name,Surname,Telephone,Address) VALUES (@Name,@Surname,@Telephone,@Address)";
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.Parameters.AddWithValue("@Name", c.Name);
                cmd.Parameters.AddWithValue("@Surname", c.Surname);
                cmd.Parameters.AddWithValue("@Telephone", c.Telephone);
                cmd.Parameters.AddWithValue("@Address", c.Address);
                conn.Open();
                int rows = cmd.ExecuteNonQuery();
                if (rows > 0)
                {
                    isSucess = true;
                }
                else
                {
                    isSucess = false;
                }
            }
            catch (Exception ex)
            {
            }
            finally
            {
                conn.Close();
            }
            return(isSucess);
        }
        //Method to update data in database
        public bool Update(CustomerClass c)
        {
            bool          isSucess = false;
            SqlConnection conn     = new SqlConnection(myconnstrng);

            try
            {
                string     sql = "UPDATE tbl_Customer SET Name=@Name, Surname=@Surname, Telephone=@Telephone, Address=@Address WHERE ID=@ID";
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.Parameters.AddWithValue("@Name", c.Name);
                cmd.Parameters.AddWithValue("@Surname", c.Surname);
                cmd.Parameters.AddWithValue("@Telephone", c.Telephone);
                cmd.Parameters.AddWithValue("@Address", c.Address);
                cmd.Parameters.AddWithValue("@ID", c.ID);
                conn.Open();
                int rows = cmd.ExecuteNonQuery();
                if (rows > 0)
                {
                    isSucess = true;
                }
                else
                {
                    isSucess = false;
                }
            }
            catch (Exception ex)
            {
            }
            finally
            {
                conn.Close();
            }
            return(isSucess);
        }
        //Mmethod to Delete data from database
        public bool Delete(CustomerClass c)
        {
            bool          isSucess = false;
            SqlConnection conn     = new SqlConnection(myconnstrng);

            try
            {
                string     sql = "DELETE FROM tbl_Customer where ID=@ID";
                SqlCommand cmd = new SqlCommand(sql, conn);
                cmd.Parameters.AddWithValue("@ID", c.ID);
                conn.Open();
                int rows = cmd.ExecuteNonQuery();
                if (rows > 0)
                {
                    isSucess = true;
                }
                else
                {
                    isSucess = false;
                }
            }
            catch
            {
            }
            finally
            {
                conn.Close();
            }
            return(isSucess);
        }