public static void Main()
{
Console.WriteLine(File.GetFileExtension("example"));
Console.WriteLine(File.GetFileExtension("example.pdf"));
Console.WriteLine(File.GetFileExtension("example.new.pdf"));
Console.WriteLine(File.GetFileNameWithoutExtension("example"));
Console.WriteLine(File.GetFileNameWithoutExtension("example.pdf"));
Console.WriteLine(File.GetFileNameWithoutExtension("example.new.pdf"));
Console.WriteLine("Distance in the 2D space = {0:f2}",
Shape.CalculateDistance2D(new Point2D(1, -2), new Point2D(3, 4)));
Console.WriteLine("Distance in the 3D space = {0:f2}",
Shape.CalculateDistance3D(new Point3D(5, 2, -1), new Point3D(3, -6, 4)));
Shape.Width = 3;
Shape.Height = 4;
Shape.Depth = 5;
Console.WriteLine("Volume = {0:f2}", Shape.CalculateVolume());
Console.WriteLine("Diagonal XYZ = {0:f2}", Shape.CalculateDiagonalXYZ());
Console.WriteLine("Diagonal XY = {0:f2}", Shape.CalculateDiagonalXY());
Console.WriteLine("Diagonal XZ = {0:f2}", Shape.CalculateDiagonalXZ());
Console.WriteLine("Diagonal YZ = {0:f2}", Shape.CalculateDiagonalYZ());
}
