Calling web service in c# hosted on java server and passing Byte[] of XML.zip file

See more:

C#

Java

webservice

I am using a web service hosted on Java server(i think so) of Income tax India E-Filing (Service manual) ,Here's service url , the service works properly in java but using it with .Net it throws exception. I am passing:

1.UserID(string),
2.Pass(string),
3.Certificate chain(string)
4.Signature(string)
5.Xml zip file(byte[])

This throws exception "Please provide zip file".
I googled hard and find that:

1. Endianness: Java stores things internally as Big Endian, while .NET is Little Endian by default.
2. Signedness: C# bytes are unsigned. Java bytes are signed.So the byte[] of zip file may not be recognized at server-side.


My code is given below:

DITWSAuthInfo authInfo = new DITWSAuthInfo();
authInfo.userID = "######";
authInfo.password  = "######";
authInfo.certChain  = "######";
authInfo.signature = "######";
string filePath = @"D:\Created XML\abc.zip";
byte[] byteArray = File.ReadAllBytes(filePath);
itrservice.submitITRRequest obj = new submitITRRequest();
obj.DITWSAuthInfoEle = authInfo;
obj.itrXMLFile = byteArray;
var res = uploadXML.submitITR(obj);
String TokenNumber = res.DITWSResponseEle.result;
MessageBox.Show(TokenNumber);

This throws error

please provide a zip file

Can you please help me to upload xml zip file?
Thanks in advance