public void RemoveConnectedStrokes(KnowledgeMapConnectedLine line)
 {
     if (this._connectedLines != null)
     {
         this._connectedLines.Remove(line);
     }
     this.UpdateAllConnectedLines();
 }
        public void AddConnectedStrokes(KnowledgeMapConnectedLine newLine)
        {
            if (this._connectedLines == null)
            {
                this._connectedLines = new List <KnowledgeMapConnectedLine>();
            }

            this._connectedLines.Add(newLine);
            this.UpdateAllConnectedLines();
        }