displaying a textbox if a certain item is selected from a dropdown list...

[HardD99]

hey guys, i need to be able to display a textbox for someone to type in something if "Other" is selected in one of my dropdown list boxes. im pretty sure i do it under the "SelectedIndexChanged" for that ddl but im not sure how to go about it. i started trying to do " if (ddlReason.SelectedItem) = "Other" then" but that was totally off, can anyone suggest a good reference or give me an example?

Using VS 2003, and C# Webform

[ComputerJy]

if (ddlReason.SelectedText == "Other");

[HardD99]

when i use that line of code i get this error :

(123): Possible mistaken null statement

[mendhak]

if (ddlReason.SelectedText == "Other")
{
this.TextBox1.Visible = true;
}