C#

foreach(object item in listBox.Items)
    if((string) item == textbox.Text)
        // do your thing

if (listbox1.Items.Contains(textbox1.Text))
{
    // you found it
}

Honeyboy_20 wrote:

How i can set icon to my new file extension

Bastard Programmer from Hell

Honeyboy_20 wrote:

I want to set it programatically

Honeyboy_20 wrote:

I'm found the method but the icon not appears

Bastard Programmer from Hell

private void textbox1_TextChanged(object sender, EventArgs e)
{
    TextBox textbox = sender as TextBox;
    if (textbox.Text.EndsWith("#"))
    {
        textbox.Text = textbox.Text.Replace("#", ".");
    }
}