ما هذا Exception

السلام عليكم

اريد حد يقول لي ما هو ال Exception في هذا الكود

public void insertsupplier(int code,int phone, string name, string address, string items, string rating, string facility, string note)
        {
            SqlConnection conn = new SqlConnection(@"Data Source=MAHMOUD-PC\SQLEXPRESS;Initial Catalog=Manage_Suppliers;User ID=sa;Password=sa");
            SqlCommand cmd = new SqlCommand();
            cmd.Connection = conn;
            String queryString = "INSERT INTO [supplier] VALUES (@code ,@phone ,@name ,@rating ,@facility ,@address ,@items ,@note )";
            cmd.CommandText = queryString;
            try
            {
                cmd.Connection = conn;
                conn.Open();
                cmd.Parameters.Clear();

                cmd.Parameters.AddWithValue("@code", code);
                cmd.Parameters.AddWithValue("@phone", phone);
                cmd.Parameters.AddWithValue("@name", name);
                cmd.Parameters.AddWithValue("@rating", rating);
                cmd.Parameters.AddWithValue("@facility", facility);
                cmd.Parameters.AddWithValue("@address", address);
                cmd.Parameters.AddWithValue("@items", items);
                cmd.Parameters.AddWithValue("@note", note);
                cmd.ExecuteNonQuery();
            }
            catch (Exception e1)
            {
                MessageBox.Show(e1.Message);
            }
            finally
            {
                cmd.Dispose();
                conn.Close();
            }

        }

يعطيني exception على هذا السطر ولا اعرف السبب ..

   cmd.ExecuteNonQuery();

وهو

operand type clash : int is incompatible with text