How can I progrommatically change the target framework from 4.0 to 3.5 of a project/solution?
- by scott
Edit 3:
After more googling it looks like you can't have the TargetFrameworkMoniker property in a .NET 3.5 application. So I guess I should be asking a different question.
How do I change the Target framework from 4.0 to 3.5? Unfortunately, I can only find stuff on how to go the other way. or better yet how do i progrommatically set the target framework version of a project to something other than 4.0?
Original question:
I just switched to vs2010. I have an application that uses .net 3.5. It loads plugins which are generated by a different app. The plugins are using .net 4 and there for cannot be loaded. I'm using EnvDTE.Project to create a project and set the settings. I can't find what setting needs to be set for this.
Edit 1:
I'm generating code for about 50 solutions. When I made the switch from vs2005 to vs2010 the projects in those solutions are defaulting to .NET Framework 4.0. So I need to set the .NET Framework to 3.5 when I am generating the code for these solutions.
Edit 2:
After a lot of googling I found this. so then I tried this:
loProp = vsGetProperty("TargetFrameworkMoniker");
vsSetValue(loProp, ".NETFramework,Version=v3.5");
the definitions for those two methods are below. as far as I can tell they do the same this as
project.Properties.Item("TargetFrameworkMoniker").Value = ".NETFramework,Version=v4.0,Profile=Client";
I start getting an Property Unavailable Exception later in the code. When I remove the new lines everything works except the projects target framework is still 4.0.
The code generators target framework is 3.5 so I can't use the FrameworkName class like shown in the second example in that link.
here is vsGetProperty
protected Property vsGetProperty(string aProperty)
{
bool lbDone = false;
int liCount = 0;
Property loProp;
while (!lbDone && liCount < pMaxRetries)
{
try
{
loProp = pProject.Properties.Item(aProperty);
lbDone = true;
return loProp;
}
catch (System.Runtime.InteropServices.COMException loE)
{
liCount++;
if ((uint)loE.ErrorCode == 0x80010001)
{
// RPC_E_CALL_REJECTED - sleep half sec then try again
System.Threading.Thread.Sleep(pDelayBetweenRetry);
}
}
}
return null;
}
and vsSetValue
protected void vsSetValue(Property aProperty, string aValue)
{
bool lbDone = false;
int liCount = 0;
while (!lbDone && liCount < pMaxRetries)
{
try
{
aProperty.Value = aValue;
lbDone = true;
}
catch (System.Runtime.InteropServices.COMException loE)
{
liCount++;
if ((uint)loE.ErrorCode == 0x80010001)
{
// RPC_E_CALL_REJECTED - sleep half sec then try again
System.Threading.Thread.Sleep(pDelayBetweenRetry);
}
}
}
}
