Why should we avoid blocking (this)?

Question

Possible duplicate:
Why is lock (this) {...} bad?

In C #, to make a critical area stream safe, we can use an operator lock(). The lock statement takes an object. What is wrong if we pass thislocks to the statement?

Answer 1

From http://msdn.microsoft.com/en-us/library/c5kehkcz.aspx :

In general, avoid blocking the public type or instances that go beyond your code. control. General designs lock (this), lock (typeof (MyType))and lock ("myLock")violate this manual:

• lock (this) , .
• lock (typeof (MyType)) - , MyType .
• lock("myLock") - , , , .

, .

Answer 2

this , , . , this, . , , , , .