.NET CORE System.Security API...Type Name could not be found

The type name 'DirectorySecurity' could not be found in the namespace 'System.Security.AccessControl'. This type has been forwarded to assembly 'System.IO.FileSystem.AccessControl, Version=4.0.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' Consider adding a reference to that assembly.

 

Working with the .NET 3 core sdk and I have had this compiler error twice now in my windows service application. Once in the System.Security.Permissions namespace and another for a type in the System.Security.AccessControl space. I asked this question on StackOverflow already and I have yet to recieve anyone willing to answer or make any attempt to answer for what seems like a simple dependency problem.

 

I myself have made multiple attempts to reference System.Security(.Permissions and .AccessControl) through nuget and locally on my machine in the - I can't figure out what is causing this compiler headache. Dotnet Sdks are on my environment path and Nuget doesn't even list a version of 4.0.4.0 for the assemblage.........I am lost.