public static void Main() { Console.WriteLine(FileNameUtilities.GetFileExtension("example")); Console.WriteLine(FileNameUtilities.GetFileExtension("example.pdf")); Console.WriteLine(FileNameUtilities.GetFileExtension("example.new.pdf")); Console.WriteLine(FileNameUtilities.GetFileNameWithoutExtension("example")); Console.WriteLine(FileNameUtilities.GetFileNameWithoutExtension("example.pdf")); Console.WriteLine(FileNameUtilities.GetFileNameWithoutExtension("example.new.pdf")); Console.WriteLine("Distance in the 2D space = {0:f2}", Calculations2D.CalcDistance2D(1, -2, 3, 4)); Console.WriteLine("Distance in the 3D space = {0:f2}", Calculations3D.CalcDistance3D(5, 2, -1, 3, -6, 4)); var someShape = new Shape(); someShape.Width = 3; someShape.Height = 4; someShape.Depth = 5; Console.WriteLine("Volume = {0:f2}", Calculations3D.CalcVolume(someShape)); Console.WriteLine("Diagonal XYZ = {0:f2}", Calculations3D.CalcDiagonalXYZ(someShape)); Console.WriteLine("Diagonal XY = {0:f2}", Calculations2D.CalcDiagonalXY(someShape)); Console.WriteLine("Diagonal XZ = {0:f2}", Calculations2D.CalcDiagonalXZ(someShape)); Console.WriteLine("Diagonal YZ = {0:f2}", Calculations2D.CalcDiagonalYZ(someShape)); }