Method contract programming is an exciting new feature in the C# language that provides developers with a way to constrain and validate method parameters at compile time. This article will introduce the concept, usage and sample code of method contract programming in detail.
The concept of method contract programming
Method contract programming is a technique that constrains and verifies method parameters by adding contract conditions in the method declaration. These contract conditions can include preconditions (preconditions) and postconditions (postconditions). Preconditions define constraints on the parameters when a method is called, while postconditions define constraints on the return value of a method.
The C# compiler will statically check these contract conditions at compile time to ensure that the method call and return value comply with the contract. This static checking provides the opportunity to catch potential problems earlier, reducing the possibility of runtime errors and improving the reliability and security of your code.
Usage of method contract programming
In C#, you can use the Requiresand Ensureskeywords to define the preconditions and postconditions of a method. Here's a simple example:
public class MathUtils
{
public static int Divide(