How to Pass Parameters to a ThreadStart Method in C#?

Passing Parameters to ThreadStart from Main Thread

When creating a new thread and passing parameters to its target method, it's essential to understand the syntax and options available in C#. Consider the following scenario:

<br>public void download(string filename)<br>{</p>
<div class="code" style="position:relative; padding:0px; margin:0px;"><pre class="brush:php;toolbar:false">// download code

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}

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

However, this code will result in a compilation error, as the ThreadStart constructor expects a method with no parameters. So, how can we pass parameters to the ThreadStart method from the main thread?

Simplest Approach: Lambda Expression

The simplest solution is to use a lambda expression as the target method, as seen below:

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

This technique allows you to pass multiple parameters to the target method and provides compile-time checking without the need for casting from objects.

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