[JsonPropertyAttribute("router:external")]
public Nullable<bool> IsExternal { get; set; }

<JsonPropertyAttribute("router:external")>
Public Property IsExternal As Nullable(Of Boolean)
	Get
	Set

public:
[JsonPropertyAttribute(L"router:external")]
property Nullable<bool> IsExternal {
	Nullable<bool> get ();
	void set (Nullable<bool> value);
}

[<JsonPropertyAttribute("router:external")>]
member IsExternal : Nullable<bool> with get, set