title: Find and remove items from array in c#
body: <p>I have a string array. I need to remove some items from that array. but I don't know the index of the items that need removing. </p>
  
  <p>My array is : string[] arr= {" ","a","b"," ","c"," ","d"," ","e","f"," "," "}.</p>
  
  <p>I need to remove the " " items. ie after removing " " my result should be 
  arr={"a","b","c","d","e","f"}</p>
  
  <p>how can I do this?</p>