net10.0 
namespace System.Security.Policy
{
    public sealed class PolicyLevel
    {
        [Obsolete("Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.")]
        public IList FullTrustAssemblies { get; }
    }
}
.NET
5.06.07.08.09.010.0
.NET Core
3.03.1
.NET Framework
2.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
Information specific to net10.0
Assembly

System.Security.Permissions , Version=10.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

Your project needs a package reference to System.Security.Permissions.

Package System.Security.Permissions (10.0.1) net10.0
Obsolete Because all GAC assemblies always get full trust, the full trust list is no longer meaningful. You should install any assemblies that are used in security policy in the GAC to ensure they are trusted.
Platform Restrictions

The property getter is supported on all platforms.

  • Built-in API
  • Package-provided API