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Asked: 2026-05-10T19:34:33+00:00

I wanted to try a little design by contract in my latest C# application

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I wanted to try a little design by contract in my latest C# application and wanted to have syntax akin to:

public string Foo() {     set {         Assert.IsNotNull(value);         Assert.IsTrue(value.Contains('bar'));         _foo = value;     } }

I know I can get static methods like this from a unit test framework, but I wanted to know if something like this was already built-in to the language or if there was already some kind of framework floating around. I can write my own Assert functions, just don’t want to reinvent the wheel.

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1 Answer

  1. C# 4.0 Code Contracts

    Microsoft has released a library for design by contract in version 4.0 of the .net framework. One of the coolest features of that library is that it also comes with a static analysis tools (similar to FxCop I guess) that leverages the details of the contracts you place on the code.

    Here are some Microsoft resources:

    Here are some other resources:

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