System.Data.SqlClient.SqlCommandBuilder.GetInsertCommand C# (CSharp) Method

		public SqlCommand GetInsertCommand ()
		{
			BuildCache (true);
			return CreateInsertCommand (null, null);
		}

        /// <summary>
        /// Permet de faire une requète de type UPDATE ou INSERT INTO
        /// </summary>
        /// <param name="rqt"> Requète</param>
        /// <param name="dt"> Database à modifier</param>
        /// <returns></returns>
        public int Update(string rqt, DataTable dt)
        {
            if (sqlConnect != null)
            {
                SqlTransaction trans = sqlConnect.BeginTransaction();
                SqlCommand sqlCmd = new SqlCommand(rqt, sqlConnect, trans);
                SqlDataAdapter sqlDA = new SqlDataAdapter(sqlCmd);
                SqlCommandBuilder build = new SqlCommandBuilder(sqlDA);
                sqlDA.UpdateCommand = build.GetUpdateCommand();
                sqlDA.InsertCommand = build.GetInsertCommand();
                sqlDA.DeleteCommand = build.GetDeleteCommand();

                sqlDA.MissingSchemaAction = MissingSchemaAction.AddWithKey;

                try
                {
                    int res = sqlDA.Update(dt);
                    trans.Commit();
                    return res;
                }
                catch (DBConcurrencyException)
                {
                    trans.Rollback();
                }
            }
            return 0;
        }