string connstring = "Data Source=localhost\SQLEXPRESS;database=Inventory;User id=raunak;Password=altran123!;" +
                       "Integrated Security=true;" +
                       "User Instance=true;" +
                       //"AttachDBFilename=|DataDirectory|Inventory.mdf;" +
                       "Initial Catalog=Inventory";
            try
            {
            using (SqlConnection connection = new SqlConnection(connstring))
            {

                SqlCommand cmd = new SqlCommand("INSERT INTO Creation (Name,Product,Quantity,Category)" +
                                     "VALUES (@Name,@Product,@Quantity,@Category)", connection);
                cmd.Parameters.AddWithValue("@Name", textBox1.Text);
                cmd.Parameters.AddWithValue("@Product", textBox2.Text);
                cmd.Parameters.AddWithValue("@Quantity", textBox3.Text.ToString());
                cmd.Parameters.AddWithValue("@Category", textBox4.Text);
                thisConnection.Open();
                cmd.ExecuteNonQuery();
            }
        }
        catch
        {
            thisConnection.Close();
        }

string connstring = "Data Source=localhostSQLEXPRESS;Initial Catalog=Inventory;User id=raunak;Password=altran123!;";

string connstring = "Data Source=localhostSQLEXPRESS;database=Inventory;User id=raunak;Password=altran123!;" + "Integrated Security=true;" + "User Instance=true;" + //"AttachDBFilename=|DataDirectory|Inventory.mdf;" + "Initial Catalog=Inventory";