title: Simplest/fastest way to check if value exists in DataTable in VB.net?
body: <p>I have a <code>DataTable</code> (currently with multiple columns but I could just grab one column if it makes it easier). I want to check if a <code>String</code> value exists in a column of the <code>DataTable</code>. (I'm doing it many times so I want it to be reasonably fast.)</p>
  
  <p>What is a good way to do this? Iterating through the <code>DataTable</code> rows each time seems like a bad way. Can I convert the column to a flat <code>List/Array</code> format, and use a built in function? Something like <code>myStrList.Contains("value")</code>?</p>