Networking :: Discard The Duplicate Packet While Reading From Socket?

I am writing a client program which will read an XML file from the server. The issue I am facing is :

1) The client is able to read the complete file but in the end it also receives a duplicate packet which is actually a part of the same(XML) file.

2) I dont want this packet but how can I be sure that this is a duplicate packet and discard it?

3) Why I am getting this packet?

Output example:

suppose this is the file at server to read :

Code:
<root>
<classes>
<class1>CLASS1</class1>
<class2>CLASS2</class2>

[Code]....