Custom sort logic in OrderBy using LINQ

Posted by Bala R on Stack Overflow See other posts from Stack Overflow or by Bala R
Published on 2010-06-09T15:47:10Z Indexed on 2010/06/09 16:32 UTC
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What would be the right way to sort a list of strings where I want items starting with an underscore '_', to be at the bottom of the list, otherwise everything is alphabetical.

Right now I'm doing something like this,

autoList.OrderBy(a => a.StartsWith("_") ? "ZZZZZZ"+a : a )

EDIT: I ended up using something like this; optimization suggestions welcome!

private class AutoCompleteComparer : IComparer<String>
        {
            public int Compare(string x, string y)
            {
                if (x.StartsWith("_") && y.StartsWith("_") || (!x.StartsWith("_") && !y.StartsWith("_")))
                {
                    return x.CompareTo(y);
                }
                else if (x.StartsWith("_"))
                {
                    return 1;
                }
                else if (y.StartsWith("_"))
                {
                    return -1;
                }

                return 0;
            }
        }

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