private void BuildRangeTree()
 {
     try
     {
         List <VertexData> vertices = _forestGraph.Vertices.Select(i => i.Data).ToList();
         if (_rangeTree.IsBuilded())
         {
             _rangeTree.Rebuild(vertices);
         }
         else
         {
             _rangeTree.Build(vertices);
         }
     }
     catch (Exception ex)
     {
         ShowMessage(ex.Message, MessageBoxIcon.Error, Resources.RangeTreeBuildError);
     }
 }