title: How do I uppercase using ItemStringFormat in WPF?
body: <p>Suppose I have a combobox where items are binded to an array of strings. I want to use ItemStringFormat to display those strings in uppercase. How do I do that?</p>
  
  <p>Update: I'm not completely clueless about formatting strings, but I've searched MSDN for a format specifier that will turn a string to uppercase, and for some reason I just can't find it! I would have expected it to be something like "{0:U}" or "{0:S}" or something like that.</p>
  
  <p>I also can't believe I wasn't able to find the answer here on SO.</p>