lock used in thread and by event

Hello,

I have a application with two threads. I have also a resoure that is
synchronized by lock.

When testing locks before this App I noticed that if one threaded
application for test purposes

invokes code like below it does not start waiting.

lock(this)

{

..... some code

lock(this)

{

.... some code

} // Execution goes through both locks.

}


Okey for my two threaded Application. In main thread there is a
method that uses lock to protect a data structure. Code is like below:

class MyClass {

public void My Method(object item)
{
lock(_myList)
{
_myList.Remove(item);
}
}

.....

}

In same class there is also a eventhandler to remove items from List
and it's fired from another thread. Code is like below.

class MyClass {
public void OnRemoveItemFromList(object sender, ItemEventArgs e)
{

lock (_myList)
{
_myList.Remove(session)
}

}

......

}



From another thread List item is remove by Event like below:

class SecondThread {
.....

RemoveItemFromListEvent(this, new ItemEventArgs (this));

.....

}



What I have noticed that lock(_myList) does not stop and start waiting
if one of the threads have aquired it.
lock(_myList) goes allways through. So, can anyone explain that is
Event call same as a call executed in thread that owns lock(_myList)
or how this goes?

Can anyone clarify this to me?
Any documentation considering this issue?

Thanks!

.

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