This morning when I turned on my development computer I had the intention to re-factor some WPF user controls but every time I tried to open any of them in the designer Visual Studio 2008 will crash without any warning.

When I opened the Application error log I found the following message: 

Log Name:      Application
Source:        .NET Runtime
Date:          3/26/2009 11:07:53 AM
Event ID:      1023
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      SRV.Dev.CyberBizSoft.com
Description:
.NET Runtime version 2.0.50727.3074 - Fatal Execution Engine Error (70FC5FC0) (80131506)
Event Xml:
<Eventxmlns="http://schemas.microsoft.com/win/2004/08/events/event">
    <System>
        <ProviderName=".NET Runtime" />
        <EventID Qualifiers="0">1023</EventID>
        <Level>2</Level>
        <Task>0</Task>
        <Keywords>0x80000000000000</Keywords>
        <TimeCreated SystemTime="2009-03-26T15:07:53.000Z" />
        <EventRecordID>186149</EventRecordID>
        <Channel>Application</Channel>
        <Computer>SRV.Dev.CyberBizSoft.com</Computer>
        <Security/>
    </System>
    <EventData>
        <Data>.NET Runtime version 2.0.50727.3074 - Fatal Execution Engine Error (70FC5FC0) (80131506)

</Data>
    </EventData>
</Event>

After some online searching I found the following thread with this link to a hotfix to this problem.