How Can I Pass Parameters to a C# Thread.ThreadStart Method?

How to Pass Parameters to Thread.ThreadStart Method in C#?

Passing parameters to the Thread.ThreadStart() method can be done easily using lambda expressions. Let's consider your scenario where you have a method called 'download' and want to create a thread that executes this method.

Your current attempt:

Thread thread = new Thread(new ThreadStart(download(filename));

will result in an error because the ThreadStart() method expects a method with no parameters. To pass parameters, you can use lambda expressions as follows:

string filename = ...
Thread thread = new Thread(() => download(filename));
thread.Start();

In this code, the lambda expression provides the no-parameter method required by ThreadStart() and internally calls the 'download' method with the specified parameter.

This approach has several advantages over using ParameterizedThreadStart:

• It allows you to pass multiple parameters to the target method.
• It provides compile-time checking, ensuring that the target method has the correct signature.

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