Difference between String and string?

String:
1.String is an class(System.String)
2.String is an Reference type(class)

string:
1.string is an alias name of String class that is created by microsoft
2.string is an value type(data type)
3.string is a C# keyword
4.string is a compiler shortcut for System.String class


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Application_BeginRequest fires every time the request
is sent.
Application_Start fires only for one time(whenever the
application is started)
Session_Start is dependant on whenever the new Session is
created.New Session can be created if Timeout occurs,
Abandon() method is called.