问题
I have created hundreds of project on VS 2010 but "File > Recent Projects and Solutions" section is not there ! normally, it should have been like this

but mine is like below;

as you can see, also on the start page, there is only two project on the 'Recent Projects' section which is odd given the circumstances.
what should I do here to get it worked?
Thanks in advance for your help.
EDIT
here is how customize window looks;

and here is the regedit view;

回答1:
It seems you have two separate problems:
The "Recent Files" and "Recent Projects and Solutions" options are missing from your File Menu.
You have a lot less Projects in your Recent Projects than you should.
Solution To #1: Go to Tools > Customize > Commands. From there you should be able to select "File | Recent Files" and "File | Recent Projects and Solutions". Next, you click "Reset All". Hopefully, you have those two lists back now.
Solution To #2: This one is a little bit more complicated because it could be a number of things.
First, I would make sure you have the number you want for the "Recent files" options in Tools > Options > Environment > General.
If you already had that, check the registry location and make sure you actually have entries here since this is where VS pulls it from. HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\10.0\ProjectMRUList . The 10.0 is for VS 2010. More info here. If there's nothing there then your recent projects aren't being saved properly.
You could try calling
Devenv /ResetSettings
to reset the VS settings. More info at MSDN.Finally it could be due to a Windows Explorer setting which hides recent files. This is a possibility because VS takes its directions from the same place with regards to recent files. You would need to make sure HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer "NoRecentDocsHistory" is zero. More info on this possible solution as well as other ideas to this problem can be found here.
回答2:
This worked for me.
open notepad and paste the text below in it without the ===== part.
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer] "NoRecentDocsHistory"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\10.0\ProjectMRUList]
=================================================================================== now save it as vs2010-fix.reg or whatever you like just make sure it ends with .reg
来源:https://stackoverflow.com/questions/5552535/visual-studio-2010-file-recent-projects-and-solutions-is-not-a-active