I can\'t test it but I need to know if it real , because I started working on project for it with .NET 4 so I must to be sure I can install it there.
So can I install .N
Microsoft has a KBEntry about installing .NET Framework 3 on Windows XP Embedded, here: http://msdn.microsoft.com/en-us/library/bb417255(WinEmbedded.5).aspx
For .NET Framework 3, the answer is "yes" -- but, because Windows XP Embedded is componentized, you need to make sure the Windows installation that you're trying to use has all of the necessary components, and it's quite a long list. I would expect the answer for .NET Framework 4 is the same, although it may require additional components. This does mean that you can't assume that .NET Framework will run on any arbitrary Windows XP Embedded installation.