[Runtime Error] MissingMethodException caused by using ToHashSet method

Today we crashed in too unpleasant bug in .NET Standard + Linq.Extras:

System.MissingMethodException Method not found: 'System.Collections.Generic.HashSet`1<!!0> Linq.Extras.XEnumerable.ToHashSet(System.Collections.Generic.IEnumerable`1<!!0>, System.Collections.Generic.IEqualityComparer`1<!!0>)'.

To reproduce it:

1. Create a project NetStandartProject targeted to .netstandard2.0
2. Add a method void SomeMethod(int[] a) => a.ToHashSet();
3. Create a second project NetCoreProject targeted to .netcoreapp2.1 or higher
4. Add NetStandartProject into NetCoreProject dependencies
5. Call SomeMethod from NetCoreProject
6. Get System.MissingMethodException

Here is a complete example solution: https://github.com/rodion-m/LinqExtrasRuntimeException. Just run NetCoreProject.

I suggest to delete all methods like ToHashSet from .netstandart target and let the developer write new HashSet(a) instead of a.ToHashSet() than crash in runtime with MissingMethodException. I think you just should make .netstandart version of Linq.Extras equal to .netcore version of Linq.Extras.

[thomaslevesque]

@rodion-m I published a new release: 5.0.0-beta.1, in which I removed the problematic methods. I also changed the TFMs (removed old ones, added new ones). Please let me know if it fixes the problem for you.

[rodion-m]

@rodion-m FYI I just published 5.0.0, using the approach described above

Great, thank you! I think we can close the issue then.