Marking libraries as Trimmable #1274
Description
I work on the .NET Runtime team and one of the customers I was working with had trouble with excessive size of their app. Looking at their app, I saw that a lot of the big assemblies in their app are produced in this repo (e.g. Microsoft.Azure.Management.Network.Fluent.dll that has 4.7 MB).
The customer was using the PublishTrimmed .NET SDK option to remove unnecessary code from their app. By default, the .NET SDK removes unused code only from libraries that manifest themselves as trimming friendly. This is to prevent breaking code that uses unpredictable reflection (and might end up reflecting on parts of the program that were trimmed).
It doesn't look like the Azure Management libraries are particularly reflection heavy. It would likely a be a good idea to manifest them as trimming friendly. Manifesting them as such is easy - one just need to add an [AssemblyMetadata("IsTrimmable", "True")] attribute. The entire process is described at https://docs.microsoft.com/en-us/dotnet/core/deploying/prepare-libraries-for-trimming. Would it be possible to mark the management libraries as such?