Communicate across application instances

I need to send a signal from one instance of my application to another instance. What would be the best method to do this?
In Win32 I would just use a named event to do this, but they aren't available in .NETSad
[282 byte] By [paulb-au] at [2007-12-17]
# 1
Depending on what you are doing, you may be able to use System.Threading.Mutex (v1.1) or System.Threading.Semaphore (v2.0).

Worst case, you could write a little NamedEventType or something that extended WaitHandle and p/invoked to create named event.

douglasp at 2007-9-9 > top of Msdn Tech,.NET Development,.NET Remoting and Runtime Serialization...

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