Lexicographical next string, to use for autocomplete searches with startkey and endkey parameters. (CouchDb, Azure Storage tables ... )

gistfile1.cs

public static string LexicographicallyNextString(string starting)
{
    starting = starting.ToLowerInvariant();
    char last = starting[starting.Length - 1];
    int position = last;
    int next = ++position;
    char nextChar = (char)next;
    string endStarting = starting.Substring(0, starting.Length - 1) + nextChar.ToString();
    return endStarting;
}