WebBrowser control Memory Leak

I created an .NET C#application to continuously creating and closing WebBrowser control for testing.  I noticed that my application memory usage has been going up per WebBrowser control.

I looked though some user group, and saw that there is apperantly a memory leak in WebBrowser control.

Here are my question:
1.  I would like this confirm if this is a known issue.
2.  Is there a fix or workaround available.

Many thanks,
Alice