Is there a way I can install Microsoft .NET Framework 3.5 in WINE? I need it for a program (which I know runs in WINE) for it to be able to work. It’s not urgent, but “the sooner the better” as the saying goes.
-BkS. :
Use winetricks to install it:
cd ~
then
wget http://kegel.com/wine/winetricks
then
bash /home/bally/winetricks dotnet35
Be aware it will install.net 2.0, then .net 3.0 first.
Or if winetricks is already installed… fire it up, then select -
Select the default wine prefix
Click OK
select -
Install a Windows DLL or component
Click OK
Tick dotnet35
Click OK
[EDIT]
Apparently it warns that .net 3.5 can’t be installed in wine yet… even .net 3.0 fails on my machine 
WineHQ also lists .net 3.5 support as “garbage”
That sucks badly I really wanting to use this program.