Добавление данных в бд / Mssql insert / C# / visual studio

Добавление данных в бд / Mssql insert / C# / visual studio код : using System.Data.SqlClient; using System.Configuration; ---------------------------------------------------- private void button1_Click(object sender, EventArgs e) { string ConnectionString = @"Data Source=(localDB)MSSQLLocalDB;Initial Catalog=test;Integrated Security=True"; using (SqlConnection conn = new SqlConnection(ConnectionString)) { conn.Open(); SqlCommand command = new SqlCommand("INSERT INTO test111 (id,name,family,kabinet) values (@id,@name,@family,@kabinet)"); command.Connection = conn; command.Parameters.AddWithValue("id", textBox1.Text); command.Parameters.AddWithValue("name", textBox2.Text); command.Parameters.AddWithValue("family", textBox3.Text); command.Parameters.AddWithValue("kabinet", textBox4.Text); command.ExecuteNonQuery();...