public static void Main() { Console.WriteLine(FileUtils.GetFileExtension("example")); Console.WriteLine(FileUtils.GetFileExtension("example.pdf")); Console.WriteLine(FileUtils.GetFileExtension("example.new.pdf")); Console.WriteLine(FileUtils.GetFileNameWithoutExtension("example")); Console.WriteLine(FileUtils.GetFileNameWithoutExtension("example.pdf")); Console.WriteLine(FileUtils.GetFileNameWithoutExtension("example.new.pdf")); Console.WriteLine("Distance in the 2D space = {0:f2}", DistanceUtils.CalcDistance2D(1, -2, 3, 4)); Console.WriteLine("Distance in the 3D space = {0:f2}", DistanceUtils.CalcDistance3D(5, 2, -1, 3, -6, 4)); var shape = new Shape(3, 4, 5); Console.WriteLine("Volume = {0:f2}", shape.CalcVolume()); Console.WriteLine("Diagonal XYZ = {0:f2}", shape.CalcDiagonalXYZ()); Console.WriteLine("Diagonal XY = {0:f2}", shape.CalcDiagonalXY()); Console.WriteLine("Diagonal XZ = {0:f2}", shape.CalcDiagonalXZ()); Console.WriteLine("Diagonal YZ = {0:f2}", shape.CalcDiagonalYZ()); }