the following feature couldn't be installed on .NET Framework 4.5 and win 2012

Question

I have created an exc in VS2012 (C#) using .NET 3.5 Framework. And run that exe on test machine - Win OS 2012 .NET Framework 4.5 only It is giving me following message

I have following questions : 1. Why it is not supporting backward compatibility of .NET Framework 3.5 ? 2. Is there any way to handle this or user has to install 3.5 .NET Framework ?

Thanks in advance.

Answer 1

I have added following configuration in app.config file and it worked like charm

  <startup>
    <supportedRuntime version="v2.0.50727" />
    <supportedRuntime version="V4.0" />
  </startup>

Answer 2

Upgrade the project to Framework 4 of 4.5, or install 3.5 (from Server Manager) are your only options i think...

See http://msdn.microsoft.com/en-us/library/ff602939.aspx for more details.

Answer 3

You have probably set .Net 3.5 as requirement at the Installer.

---

The .NET Framework 4.5 is backward-compatible with applications that were built with the .NET Framework versions 1.1, 2.0, 3.0, 3.5, and 4. In other words, applications and components built with previous versions of the .NET Framework will work on the .NET Framework 4.5.

http://msdn.microsoft.com/en-us/library/ff602939.aspx

http://blogs.msdn.com/b/dotnet/archive/2011/09/26/compatibility-of-net-framework-4-5.aspx

Answer 4

dism /online /enable-feature /featurename:NetFx3 /All /Source:d:\sources\sxs /LimitAccess

where d:\ is the CD ROM drive your windows CD is in.

then try again.