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Here two methods below that uses SPSecurity.RunWithElevatedPrivileges(). I just want to know the difference between two?

Method 1:

public void Method1(SPUser user) { if (RequireImpersonation == true) SPSecurity.RunWithElevatedPrivileges(delegate() { PerformRemoveFromVisitorsGroup(user); }); else PerformRemoveFromVisitorsGroup(user); }

Mehtod 2:

public void Method2(SPUser user) { if (RequireImpersonation == true) SPSecurity.RunWithElevatedPrivileges(() => PerformRemoveFromVisitorsGroup(user)); else PerformRemoveFromVisitorsGroup(user); }
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Once the code is compiled, there is no difference between these two. In this case - delegate { } is equal to () => { }. There are a couple of things, but they are not relevant in this case:

  1. If you assign the lambda to a delegate type (such as Func or Action) you'll get an anonymous delegate. [1]
  2. If you assign the lambda to an Expression type, you'll get an expression tree instead of a anonymous delegate. The expression tree can then be compiled to an anonymous delegate. [1]

[1] - http://weblogs.asp.net/scottgu/new-orcas-language-feature-lambda-expressions

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