using SPSecurity.RunWithElevatedPrivileges

Question

SharePoint 2013 on-premise

What is the difference of using:

SPSecurity.RunWithElevatedPrivileges(() =>
{
    using (SPWeb web = site.OpenWeb())
    {
        ....
    }
}

with

SPSecurity.RunWithElevatedPrivileges(delegate()
{
    using (SPWeb web = site.OpenWeb())
    {
        ....
    }
}

the first code not work, but the second code if it works.

what is the difference between the second code works and the another not?

Answer 1

Code wizards, correct me if I'm wrong, but I think the first is a lamda which basically states this anonymous function is bound anonymously, but is not instantiated. The second is a delegate that is also instantiated. It's the same as saying:

MyHelloDelegateType2 Hello3 = delegate {
 MessageBox.Show("Default message!");
};

but you need to instantiate it, it's just creating a delegate object.

Hello3("Test");

So:

SPSecurity.RunWithElevatedPrivileges(Delegate object) vs SPSecurity.RunWithElevatedPrivileges(Delegated code)