Why do you use ?
Code:
SqlConnection connection = new SqlConnection("[B]user id[/B]=" + this.textBox4.Text + ";password=" + this.textBox5.Text + ";server=" + this.textBox3.Text + ";Trusted_Connection=no;database=" + this.textBox1.Text + "; [B]connection timeout=5[/B]");
Simpler = better . Beside , remove this. next time .. as soon as it's in same form doesnt needed . It's only an argument if you wanna to transfer the textbox to another form like
form2.textBox1.Text = "gay"; even if you're connected with form1 ..
Anyway , nice tool..