<PackageReference Include="System.Security.Permissions" Version="10.0.4" />

System.Security.Policy.CodeConnectAccess

public class CodeConnectAccess
Specifies the network resource access that is granted to code.
namespace System.Security.Policy { public class CodeConnectAccess { public static readonly string AnyScheme; public static readonly int DefaultPort; public static readonly int OriginPort; public static readonly string OriginScheme; public int Port { get; } public string Scheme { get; } public CodeConnectAccess(string allowScheme, int allowPort); public static CodeConnectAccess CreateAnySchemeAccess(int allowPort); public static CodeConnectAccess CreateOriginSchemeAccess(int allowPort); } }