/// <summary>
/// Clear the panel.
/// </summary>
private void ButtonClearPanel_Click(object sender, EventArgs e)
{
SetCurrentTool(buttonClearPanel);
foreach (Vertex v in vertices)
{
v.Dispose();
}
vertices.Clear();
mapMatrix.Clear();
mapList.Clear();
defaultVertexNameCounter = 'A';
Array.Clear(vertexNameUsed, 0, vertexNameUsed.Length);
ResetBoard();
topLeft = new Point(this.panelSketchBoard.Width, this.panelSketchBoard.Height);
bottomRight = new Point(0, 0);
}