VINIL.APP/proba/Form1/VidNomenklatury_add.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;
using System.Windows.Forms;


namespace proba
{
    public partial class VidNomenklatury_add : Form
    {
        DataBase dataBase = new DataBase();
        public VidNomenklatury_add()
        {
            InitializeComponent();
        }


        private void button_back_Click(object sender, EventArgs e)
        {
            this.Hide();
            VidNomenkatury vidNomenkatury = new VidNomenkatury();
            vidNomenkatury.ShowDialog();
        }


        private void button_save_Click(object sender, EventArgs e)
        {
            dataBase.openConnection();
            var view_tools = text_description.Text;
           
           
        
            var addQuery = $"insert into [View_tools] (view_tools) values (N'{view_tools}')";
            var command = new SqlCommand(addQuery, dataBase.GetConnection());
            command.ExecuteNonQuery();
            MessageBox.Show("Запись успешно добавлена в таблицу");
            dataBase.closeConnection();
        }

        private void VidNomenklatury_add_FormClosing(object sender, FormClosingEventArgs e)
        {
            Application.Exit();
        }
    }
}