Cannot see _ (underscore) in WPF content

Question

A very simple question:

Why I cant see _ (underscore) in WPF content?

For instance the content of

<Label Content="test_t" Name="label2"  />

is shown as "testt" (with the underscore not shown).

Answer 1

Labels support mnemonics (i.e. you can use ctrl+(key) to give them focus). You define the mnemonic key using an underscore.

http://www.charlespetzold.com/blog/2006/01/061004.html

If you want to see underscores, replace single underscores with double underscores.

Answer 2

This is because Label supports defining a mnemonic based on its content, which is done by prefixing the mnemonic with an underscore (the same thing that happens in Windows Forms with &).

Use a double underscore if you want a literal one to appear:

<Label Content="test__t" Name="label2"  />

Answer 3

I know im late to the party but I believe that if you don't have the Label associated to a TextBox than you should use a TextBlock instead.

Changing your control to a TextBlock solves this issue since only Label has the mnemonic support