[DEVEXPRESS/WINFORM] RichEditControl 클래스 : 문서 범위로 부분적인 선택 설정 취소하기

using DevExpress.XtraRichEdit;
using DevExpress.XtraRichEdit.API.Native;

...

private RichEditControl richEditControl;

...

Document document = this.richEditControl.Document;

...

DocumentRange documentRange1 = document.CreateRange(300, 100);

int position = document.Tables[0].Rows[0].LastCell.ContentRange.Start.ToInt();

DocumentRange documentRange2 = document.CreateRange(position, 100);
DocumentRange documentRange3 = document.CreateRange(720     , 100);

document.Selections.Add
(
    new List<DocumentRange>()
    {
        documentRange1,
        documentRange2,
        documentRange3
    }
);

DocumentRange documentRange4 = document.CreateRange(350, 400);

document.Selections.Unselect(documentRange4);