Allow multiple .net framework versions.
v4.5, v4, v3.5, v3, v2
Jim Beam commented
I am guessing no one is working on these because this was submitted in 2013, is the #2 requested item, yet still was upgrade to compiler 4.7.2 with no backwards support. There were several major changes to functionality and method support between 4.5 to 4.6.2 to 4.7.2. There is no accurate way to use this site for project which cannot be upgraded to 4.7.2 as the results may differ.
Dennis V McEnaney commented
It doesn't seem clear how I'd set this:
<httpRuntime targetFramework="4.5" />
Or this even:
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />