<!DOCTYPE qhelp PUBLIC

"-//Semmle//qhelp//EN"

"qhelp.dtd">

<qhelp>

<overview>

<p>It is inadvisable to use <code>this</code> in a <code>lock</code> statement,

because other classes could also attempt to lock the object, resulting in inefficiency or

deadlock.</p>

</overview>

<recommendation>

<p>Create a <code>private readonly Object</code>

which is used exclusively for locking. This ensures that no other classes can

use the same lock.

</p></recommendation>

<example>

<p>The following example uses a <code>private readonly</code>

variable called <code>mutex</code> to use in the <code>lock</code> statement.</p>

<sample src="LockThis.cs" />

</example>

<references>

<li>MSDN, C# Reference: <a href="http://msdn.microsoft.com/en-gb/library/c5kehkcz.aspx">lock Statement</a>.</li>

</references>

</qhelp>