---
title: "Multithreading with C#"
description: "This blog explains how multithreading works in c#.What is a thread?A thread can be defined as a semi-process with a definite starting point, an execut"
author: "priyanka kushwaha"
published: 2015-02-24
updated: 2015-02-24
canonical: https://www.mindstick.com/blog/784/multithreading-with-c-sharp
category: ".net"
tags: ["c#", "asp.net", "thread", "multiple threading"]
reading_time: 2 minutes
---
# Multithreading with C#
This blog explains how [multithreading](https://www.mindstick.com/articles/11979/multithreading-with-the-backgroundworker-component-in-asp-dot-net) works in c#.
What is a thread?
A thread can be defined as a semi-process with a definite [starting](https://www.mindstick.com/blog/12024/things-you-need-to-know-when-starting-your-own-business) point, an [execution](https://www.mindstick.com/blog/178/synchronous-and-asynchronous-command-execution-in-c-sharp-dot-net) [sequence](https://www.mindstick.com/interview/34504/difference-between-identity-vs-sequence) and a terminating point. It maintains its own stack where it keeps the [exception](https://www.mindstick.com/articles/1824/objective-c-exception-handling) [handlers](https://www.mindstick.com/forum/1388/button-handlers-in-xaml), the [scheduling](https://www.mindstick.com/forum/157665/explain-the-round-robin-scheduling-algorithm-with-an-example-in-os) priority and other details that the system might need to re-activated that thread.
System.[Threading](https://www.mindstick.com/blog/187/threading-in-c-sharp). Thread is the main class for creating threads and controlling them.
The thread class has a number of methods.
1. Start(): starts the execution of the thread.
2. Suspend(): suspends the thread.
3. Resume: resumes a thread that has been suspend.
4. Interrupt: interrupts a thread that is in the wait, sleep or join stage.
5. Join(): blocks a calling thread until the thread terminates.
6. Sleep(int x): suspends the thread for specified amount of time.
7. Abort(): Begins the process of terminating the thread. Once the thread terminates, it cannot be restarted by calling the [function](https://www.mindstick.com/articles/13001/multi-statement-table-valued-user-defined-function-in-sql-server) Start() again.
\
Thread Priority:
System.Threading.Thread.Priority [enumeration](https://www.mindstick.com/blog/88/enumeration-in-c-sharp) defines the priority states of a thread.
1. Highest
2. AboveNormal
3. Normal
4. BelowNormal
5. Lowest
Example:
##### Default.aspx
```
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ThreadingExample.Default" %>
```
##### Default.aspx.cs
```
using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Threading;namespace ThreadingExample{ public partial class Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { ThreadStart childthread = new ThreadStart(ChildThreadCall); Response.Write("Child thread started"); Thread child = new Thread(childthread); child.Start(); Response.Write("Main thread is sleeping for 1 second..."); Thread.Sleep(1000); Response.Write("Main Thread is aborting child thread"); child.Abort(); } public void ChildThreadCall() { try { lblMsg.Text = "Child thread started"; lblMsg.Text += "Child Thread is counting to 5...."; for (int i = 0; i < 5; i++) { Thread.Sleep(500); lblMsg.Text += "we are in child thread"; } } catch (ThreadAbortException ex) { lblMsg.Text += "child thread exception"; } finally { lblMsg.Text += "Unable to catch to exception"; } } }}
```
##### Output:
---
Original Source: https://www.mindstick.com/blog/784/multithreading-with-c-sharp
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