How do I set the selected item in a comboBox to match my string using C#?

I have a string "test1" and my comboBox contains test1, test2, and test3. How do I set the selected item to "test1"? That is, how do I match my string to one of the comboBox items?

I was thinking of the line below, but this doesn't work.

comboBox1.SelectedText = "test1"; 

This should do the trick:

Combox1.SelectedIndex = Combox1.FindStringExact("test1")

Have you tried the Text property? It works for me.

ComboBox1.Text = "test1";

The SelectedText property is for the selected portion of the editable text in the textbox part of the combo box.