C# Code Property Error

Hello Experts. When I am compiling my code, or at random times when I am designing a user control that contains the property 'ManuallyAddedCurves', it gives me the same error. I even comment out the code (which I really don't use), and it still gives me the same error. I am not sure how to fix this... The error is really bugging me, however my code still works fine.

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Microsoft Visual Studio
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Code generation for property 'ManuallyAddedCurves' failed.  Error was: 'Type 'ModelEditorApplication.Common.ManuallyAddCurveNameEventArgs' in Assembly 'ModelEditor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' is not marked as serializable.'
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OK  
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LVL 6
RishadanPortAsked:
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Bob LearnedConnect With a Mentor Commented:
There is not enough detail to help you with this problem.  You could start with Visual Studio.NET version.  Then, are there any service packs installed?  Operating system?  Does this happen on more than 1 machine?
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RishadanPortAuthor Commented:
My code always builds fine, just issues this error like 5 times before it builds
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RishadanPortAuthor Commented:
And if I close Microsoft visual studio, and then reopen it... the Error messages are no longer sent to me.... for a while.
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RishadanPortAuthor Commented:
I don't use more then 1 machine for this project. It only happens periodically, and once I close Visual Studio, and reopen it, the error disappears. What could cause this?    (The error then later, at some random time popups up again, but I can still compile and run fine)
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Bob LearnedCommented:
I don't know what would cause this, but you didn't indicate .NET version and operating system.
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RishadanPortAuthor Commented:
Microsoft Visual Studio 2005
Version 8.0.50727.762 (SP.050727-7600)

Microsoft .NET Framework
Version 2.0.50727 SP1
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RishadanPortAuthor Commented:
Operating system Windows XP
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Bob LearnedCommented:
Operating system?
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Bob LearnedCommented:
Is the 'ManuallyAddCurveNameEventArgs' marked with an Editor attribute and 'ModelEditor'?
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RishadanPortAuthor Commented:
I don't think I put any attributes.
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RishadanPortAuthor Commented:
Nothing except the Main Method has any attributes.


Main is just simply declared like this:

        [STAThread]
        static void Main()
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Bob LearnedCommented:
When does this occur?  Can you attach a .png screenshot of the circumstances?
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RishadanPortAuthor Commented:
Currently the situation stopped happening after I closed Visual Studio, and then reopened it. It previously happened every time I tried compiling. It would issue this error popup box 5 times repeatedly (after clicking the OK button each time).

It would also show the error when I was working with the UserControl that had the property 'ManuallyAddedCurves'. (again it would popup the error box 5 times after clicking ok each time). If I see it again I will post a screen shot
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RishadanPortAuthor Commented:
I had previously tried closing and reopening Visual Studio... but again the situation started happening a day or more later, so still think the problem lurks out there.
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RishadanPortAuthor Commented:
After restarting Visual Studio a while ago, the problem has not occured since then... however I am still puzzled by the problem
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