public virtual ExcelColors TabKnownColor { get; set; }

Public Overridable Property TabKnownColor As ExcelColors
	Get
	Set

public:
virtual property ExcelColors TabKnownColor {
	ExcelColors get ();
	void set (ExcelColors value);
}

abstract TabKnownColor : ExcelColors with get, set
override TabKnownColor : ExcelColors with get, set