.net - C# Crypt returning null -


i have method: 

    public static string decryptfile(string sinputfilename,        string skey)     {         descryptoserviceprovider des = new descryptoserviceprovider();         des.key = asciiencoding.ascii.getbytes(skey);         des.iv = asciiencoding.ascii.getbytes(skey);          filestream fsread = new filestream(sinputfilename,            filemode.open,            fileaccess.read);         icryptotransform desdecrypt = des.createdecryptor();          cryptostream cryptostreamdecr = new cryptostream(fsread,            desdecrypt,            cryptostreammode.read);          return new streamreader(cryptostreamdecr).readtoend();     }

this crypt method:

    public static void encryptfile(string sinputfilename,        string soutputfilename,        string skey)     {         filestream fsinput = new filestream(sinputfilename,            filemode.open,            fileaccess.read);          filestream fsencrypted = new filestream(soutputfilename,            filemode.create,            fileaccess.write);         descryptoserviceprovider des = new descryptoserviceprovider();         des.key = asciiencoding.ascii.getbytes(skey);         des.iv = asciiencoding.ascii.getbytes(skey);         icryptotransform desencrypt = des.createencryptor();         cryptostream cryptostream = new cryptostream(fsencrypted,            desencrypt,            cryptostreammode.write);          byte[] bytearrayinput = new byte[fsinput.length];         fsinput.read(bytearrayinput, 0, bytearrayinput.length);         cryptostream.write(bytearrayinput, 0, bytearrayinput.length);         cryptostream.close();         fsinput.close();         fsencrypted.close();     }

in crypt file, putting string commas contains array. here code pulling data:

ssecretkey = crypt.generatekey(); gchandle gch = gchandle.alloc(ssecretkey, gchandletype.pinned);  string data = crypt.decryptfile(dencrypt, ssecretkey); crypt.zeromemory(gch.addrofpinnedobject(), ssecretkey.length * 2); gch.free();  string[] arr = data.split(',');

now, after running putting break point on line of var , see it's null , not containing anything..

someone know problem?


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