c# Loading mysql config

[Jaiz]

I coded a test tool mysql config tool. I can save my config but not load? Somebody can help me? 

try
{
System.IO.TextReader textreader1 = new System.IO.StreamReader("Jaiz.set");


textreader1.Close();
this.statuslbl.ForeColor = Color.Green;
statuslbl.Text = "Reading MySQL Config file Succesfull!";

}
catch
{

this.statuslbl.ForeColor = Color.Red;
statuslbl.Text = "Reading MySQL Config file failed!";
}

what i have to write next? 

maybe that? 

textreader1.ReadLine(textBox_host.Text);

but seem to not work. I hope somebody can help me