<PackageReference Include="System.Security.Permissions" Version="9.0.5" />

UnionCodeGroup

public sealed class UnionCodeGroup : CodeGroup
Represents a code group whose policy statement is the union of the current code group's policy statement and the policy statement of all its matching child code groups. This class cannot be inherited.
namespace System.Security.Policy { [System.Obsolete("This type is obsolete. See https://go.microsoft.com/fwlink/?LinkID=155570 for more information.")] public sealed class UnionCodeGroup : CodeGroup { public override string MergeLogic => null; public UnionCodeGroup(IMembershipCondition membershipCondition, PolicyStatement policy) : base(null, null) { } public override CodeGroup Copy() { return null; } public override PolicyStatement Resolve(Evidence evidence) { return null; } public override CodeGroup ResolveMatchingCodeGroups(Evidence evidence) { return null; } } }