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Tip #006

Chain lambdas on one delegate

C# 3

Code card: Chain lambdas on one delegate. Program output: Hello World, .NET & Khalid

About this tip

Delegates are multicast: += chains lambdas and one call runs them all, in order. It is available since C# 3. The key line is hello += () => Console.Write("World, ") in lambdas.cs. Run it and the output reads Hello World, .NET & Khalid.

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Code

lambdas.cs
Action hello = () => Console.Write("Hello ");
hello += () => Console.Write("World, ");
hello += () => Console.WriteLine(".NET & Khalid");
hello();

Output

Output
$ dotnet run lambdas.cs
Hello World, .NET & Khalid