What is C# | How to check current state of a thread?

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C# | How to check current state of a thread️‍🔥

A Thread class is responsible for creating and managing a thread in multi-thread programming. It provides a property known as ThreadState to check the current state of the thread. The initial state of a thread is Unstarted state.

Syntax:

public ThreadState ThreadState{ get; }

Return Value: This property returns the value that indicates the state of the current thread.

Below programs illustrate the use of ThreadState property:

Example 1:

// C# program to illustrate the  
// use of ThreadState property 
using System; 
using System.Threading; 
  
public class GFG { 
  
    // Main Method 
    static public void Main() 
    { 
        Thread thr; 
  
        // Get the reference of main Thread 
        // Using CurrentThread property 
        thr = Thread.CurrentThread; 
  
        // Display the current state 
        // of the main thread 
        Console.WriteLine("The name of the current state of the Main " 
                                 + "thread is: {0}", thr.ThreadState); 
    } 
} 

Output:

The name of the current state of the main thread is: Running

Example 2:

// C# program to illustrate the  
// use of ThreadState property 
using System; 
using System.Threading; 
  
public class GFG { 
  
    // Main method 
    public static void Main() 
    { 
        // Creating and initializing threads 
        Thread TR1 = new Thread(new ThreadStart(job)); 
        Thread TR2 = new Thread(new ThreadStart(job)); 
  
        Console.WriteLine("ThreadState of TR1 thread"+ 
                         " is: {0}", TR1.ThreadState); 
  
        Console.WriteLine("ThreadState of TR2 thread"+ 
                         " is: {0}", TR2.ThreadState); 
  
        // Running state 
        TR1.Start(); 
        Console.WriteLine("ThreadState of TR1 thread "+ 
                           "is: {0}", TR1.ThreadState); 
  
        TR2.Start(); 
        Console.WriteLine("ThreadState of TR2 thread"+ 
                         " is: {0}", TR2.ThreadState); 
    } 
  
    // Static method 
    public static void job() 
    { 
        Thread.Sleep(2000); 
    } 
} 

Output:

ThreadState of TR1 thread is: Unstarted
ThreadState of TR2 thread is: Unstarted
ThreadState of TR1 thread is: Running
ThreadState of TR2 thread is: WaitSleepJoin

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.threading.thread.threadstate?view=netframework-4.7.2