net7.0 
namespace System.Security.Policy
{
    public abstract class CodeGroup
    {
        public void FromXml(SecurityElement e, PolicyLevel level);
    }
}
nuget.org
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Reference this API
.NET 5.06.07.08.09.010.0
.NET Core 2.02.12.23.03.1
.NET Framework 1.01.12.03.03.54.04.54.5.14.5.24.64.6.14.6.24.74.7.14.7.24.84.8.1
.NET Standard 2.02.1
Information specific to net7.0
Assemblies

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

System.Security.Permissions , Version=9.0.0.0, PublicKeyToken=cc7b13ffcd2ddd51

Referencing

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

Package System.Security.Permissions (10.0.0-preview.1.25080.5) netstandard2.0
Platform Restrictions

This API is supported on all platforms.

  • Built-in API
  • Package-provided API