About Streaming LINQ

Dear all

I need some help about xml streaming with LINQ. I am developing a application in which I am using XML File of size 50 MB.

XML file hold the information about the client so when I enter the client code in my application, data should be search in XML file and return all the other data of client.

I don't want to hit the same on database b'coz client searching is more frequently task. And I will generate the XML file beginning of the day.(I can modify the xml format if needed)

So please give me some idea about the same. I am waiting your response.