/// <summary>
/// Removes all vertices and edges from graph.
/// </summary>
protected void RemoveAllGraphElements()
{
foreach (TVertex vertex in VerticesControls.Keys.ToArray())
{
RemoveVertexControl(vertex);
}
foreach (TEdge edge in EdgesControls.Keys.ToArray())
{
RemoveEdgeControl(edge);
}
VerticesControls.Clear();
EdgesControls.Clear();
}
