<PackageReference Include="System.Security.Permissions" Version="11.0.0-preview.5.26302.115" />

System.Security.Permissions.UIPermissionClipboard

public enum UIPermissionClipboard
Specifies the type of clipboard access that is allowed to the calling code.
namespace System.Security.Permissions { public enum UIPermissionClipboard { AllClipboard = 2, NoClipboard = 0, OwnClipboard = 1 } }