CustomRichTextBoxModelText - свойство

[CanBeNullAttribute]
public string Text { get; set; }

<CanBeNullAttribute>
Public Property Text As String
	Get
	Set

public:
[CanBeNullAttribute]
property String^ Text {
	String^ get ();
	void set (String^ value);
}

[<CanBeNullAttribute>]
member Text : string with get, set