Convert date to Chinese capital number

To write a small method of converting the date, although very short, but need to consider the things are quite a bit, record.

 /// <summary>    ///Convert a date to Chinese capital///Example: 19,957/// </summary>     Public classChinesenumberhelper {Staticdictionary<int,string> _thenumofchinesecapital =Newdictionary<int,string>()         {            {0,"0"},            {1,"a"},            {2,"two"},            {3,"three"},            {4,"Four"},            {5,"Five"},            {6,"Six"},            {7,"Seven"},            {8,"Eight"},            {9,"Nine"},            {Ten,"10"}        };  Public Static stringConvertostring (ObjectNumber , Numbertype numtype) {            varinput =convert.tostring (number); intValidateint; if(string. Isnullorwhitespace (input) | | !int. TryParse (Input, outvalidateint)) Throw NewArgumentException (" Number"); if(Validateint = =0)                Throw NewArgumentException (" Number"); //more verification If it is the date of the month and day of input            if(Numtype = = Numbertype.day | | numtype = = numbertype.day) && input. Length = =2) Input= input. TrimStart ('0'); StringBuilder OutPut=NewStringBuilder (); Switch(numtype) { Casenumbertype.year: for(inti =0; I < input. Length; i++)                    {                        varIntval =Convert.ToInt32 (Input[i].                        ToString ());                    Output.append (_thenumofchinesecapital[intval]); }                     Break;  CaseNumbertype.moth: CaseNumbertype.day:if(Validateint <Ten) {output.append (_thenumofchinesecapital[convert.toint32 (input[0].                    ToString ())]); }                    Else if(Validateint = =Ten) {output.append (_thenumofchinesecapital[validateint]); }                    Else                    {                        if(Validateint > +) Output.append (_thenumofchinesecapital[convert.toint32 (input[0].                        ToString ())]); Output.append (_thenumofchinesecapital[Ten]); if(input[1] !='0') Output.append (_thenumofchinesecapital[convert.toint32 (input[1].                    ToString ())]); }                     Break; }            returnoutput.tostring (); }    }     Public enumnumbertype {year, moth, day}

Convert date to Chinese capital number