Delphi		Delphi source code can be commented by one of three possible ways: { First way of comment, can be multiline } (* Second way of comment, can be multiline *) // Third way of comment, can be one line only The different ways can be combined: { This is a (* comment *) within another comment } Two ways of multiline comment allow to comment the multiline code, contained the multiline comments: (* begin { The following code can be deleted or commented, if you can use both odd and even numbers } X:=1; // set start value as odd number Inc(X,2); // find the next odd number end; *)
C#		There are only two ways to comment the code in C#: /* First way of comment, can be multiline */ // Second way of comment, can be one line only Of course, different ways can be combined: /* This code is commented int X = 0; // create new integer variable */ Unfortunately, there is no way to comment multiline code with multiline comments within. /* commented for testing X++; /* < illegal! we have to ignore X=3 due to some problems */ if (X == 3) X++; */ There is special comment started from triple backslash: /// <summary> /// This class represents circle funtionality. /// </summary> public class Circle{} This comment allows to insert XML tags into your code. These tags are used for creating XML documentation.      There is only one multiline comment way. Special /// comment for auto-creating XML documentation. Avoid the multiline comments /**/ within you code - this will allow you to comment the large part of code when debugging. See "XML Documentation Comments" in your Visual Studio documentation for more detailed information about /// and XML tags.