If false, the collection can contain only one sort expression at a time. Trying to add a new one in this case will delete the existing expression or will change the sort order if its FiledName is the same.

public bool AllowMultiFieldSorting { get; set; }

Public Property AllowMultiFieldSorting As Boolean
	Get
	Set

public:
property bool AllowMultiFieldSorting {
	bool get ();
	void set (bool value);
}

member AllowMultiFieldSorting : bool with get, set