Some apps might run completely unmodified, but that's not really our plan. We intend for folks to update their apps to target .NET Core 3. We intend to support

Some apps might run completely unmodified, but that's not really our plan. We intend for folks to update their apps to target .NET Core 3. We intend to support all the APIs that we find that client apps use. We're not including ASP.NET Web Forms, for example, but we'll definitely be supporting System.Drawing. We've already shifted to putting more effort into the .NET Core project. The last few .NET Framework releases have been pretty targeted. That trend will continue. We'll continue adding existing .NET Framework APIs on Core to make it so that devs can move more and more apps to .NET Core. That's the basic plan. From the post: * Desktop applications will need to target .NET Core 3 and recompile. * Project files will need to be updated to target .NET Core 3. * Dependencies will not need to retarget and recompile. There will be additional benefits if you update dependencies.