private static void Main() { Console.WriteLine(Utils.GetFileExtension("example.cs")); Console.WriteLine(Utils.GetFileExtension("example.pdf")); Console.WriteLine(Utils.GetFileExtension("example.new.pdf")); Console.WriteLine(Utils.GetFileNameWithoutExtension("example.cs")); Console.WriteLine(Utils.GetFileNameWithoutExtension("example.pdf")); Console.WriteLine(Utils.GetFileNameWithoutExtension("example.new.pdf")); Console.WriteLine("Distance in the 2D space = {0:f2}", Figure.CalculateDistance2D(1, 2, 3, 4)); Console.WriteLine("Distance in the 3D space = {0:f2}", Figure.CalculateDistance3D(5, 2, 1, 3, 6, 4)); Figure figure = new Figure(); figure.Width = 3; figure.Height = 4; figure.Depth = 5; Console.WriteLine("Volume = {0:f2}", figure.CalculateVolume()); Console.WriteLine("Diagonal XYZ = {0:f2}", figure.CalculateDiagonal3D()); Console.WriteLine("Diagonal XY = {0:f2}", figure.CalculateDiagonalXY()); Console.WriteLine("Diagonal XZ = {0:f2}", figure.CalculateDiagonalXZ()); Console.WriteLine("Diagonal YZ = {0:f2}", figure.CalculateDiagonalYZ()); }