c# - Linq - get max of string that ends with an integer -

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this question has answer here:

i'm trying max of string column such - a1 a2 a3 ...

but when max number 10 or above - linq returns a9 max. why?

how solve this?

the code- 

from d in db.documents.orderbydescending(d => d.number) (.....) select d.number) .firstordefault();

thanks in advance!

you cant normal linq, if want compare alphanumeric values, should this,

static void main(string[] args)         {             list<string> vals = new list<string>();             vals.add("a1");             vals.add("a11");             vals.add("a41");             vals.add("a13");             vals.add("a12");             vals.add("a9");             var result = vals.orderbydescending(x => ordernumbers(x));         }         public static string ordernumbers(string input)         {             return regex.replace(input, "[0-9]+", match => match.value.padleft(10, '0'));         }

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