EN
C#/.NET - Foreground & Background Threads
5 points
In this article, we would like to show how to create foreground and background threads in C# / .NET.
Foreground vs Background thread:
- Foreground thread is threads that is still executed after main thread stopped working
(that threads prevent a process from terminating).- Background thread is threads that ends execution when main thread stops execution.
Quick solution:
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// using System.Threading;2
3
Thread thread = new Thread(() =>4
{5
// put some source code here ...6
});7
8
// thread.IsBackground = true; // background thread 9
// thread.IsBackground = false; // foreground thread (by default is false)10
11
thread.Start();
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using System;2
using System.Threading;3
4
namespace Test5
{6
public class Program7
{8
static void Main(string[] args)9
{10
Console.WriteLine("Main thread started...");11
12
Thread thread = new Thread(() =>13
{14
Console.WriteLine("My foreground thread started...");15
Thread.Sleep(1000);16
Console.WriteLine("My foreground thread stopping...");17
});18
19
thread.IsBackground = false;20
thread.Start();21
22
Thread.Sleep(500);23
Console.WriteLine("Main thread stopping...");24
}25
}26
}Output:
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Main thread started...2
My foreground thread started...3
Main thread stopping...4
My foreground thread stopping.Summary:
My foreground thread ended execution after main thread ended.
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using System;2
using System.Threading;3
4
namespace Test5
{6
public class Program7
{8
static void Main(string[] args)9
{10
Console.WriteLine("Main thread started...");11
12
Thread thread = new Thread(() =>13
{14
Console.WriteLine("My background thread started...");15
Thread.Sleep(1000);16
Console.WriteLine("My background thread stopping...");17
});18
19
thread.IsBackground = true;20
thread.Start();21
22
Thread.Sleep(500);23
Console.WriteLine("Main thread stopping...");24
}25
}26
}Output:
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Main thread started...2
My foreground thread started...3
Main thread stopping...Summary:
My foreground thread stopping...was never printed because bacground thread ended with main thread.