Null and blank values

Posted by Jonathan D on Stack Overflow See other posts from Stack Overflow or by Jonathan D
Published on 2010-05-25T08:58:14Z Indexed on 2010/05/25 9:11 UTC
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What's the best way of writing robust code so that a variable can be checked for null and blank.

e.g.

string a;

if((a != null) && (a.Length() > 0))
{
    //do some thing with a
}

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