http://blogs.msdn.com/jmstall/archive/2005/11/11/ContextSwitchDeadLock.aspxThe ContextSwitchDeadLock MDA (I blogged about MDAs here ) sometimes fires under the debugger. MSDN says: It is possible for this MDA to be falsely activated when all of the following conditions are met: * An application creates COM components from STAen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/jmstall/archive/2005/11/11/ContextSwitchDeadLock.aspx#8519214Mon, 19 May 2008 19:19:23 GMT91d46819-8472-40ad-a661-2c78acb4018c:8519214Andrew Stopford's Weblog<p>While debugging a managed code batch process today I ran into VS throwing a 'ContextSwitchDeadlock MDA</p>