Thread.ResetAbort Method in C#

A Thread class is responsible for creating and managing a thread in multi-thread programming. It provides a method known as ResetAbort which is responsible for canceling the abort request of the current thread. It prevents the ThreadAbortException from terminating the thread.

Syntax:

public static void ResetAbort ();

Exceptions:

ThreadStateException : If the Abort was not invoked on the current thread.
SecurityException : If the caller does not have the required security permission for the current thread.

Below programs illustrate the use of ResetAbort() method:

Example 1:

// C# program to illustrate the 
// use of ResetAbort method 
using System; 
using System.Threading; 
using System.Security.Permissions; 
  
class MyThread { 
  
    // Method Job 
    public void Job() 
    { 
        try { 
  
            for (int I = 0; I < 10; I++)  
            { 
                Console.WriteLine(" My Thread is working..!"); 
                Thread.Sleep(100); 
            } 
        } 
  
        catch (ThreadAbortException e)  
        { 
            Console.WriteLine("Caught ThreadAbortException and reset"); 
            Console.WriteLine("Ex message: {0}", e.Message); 
            Thread.ResetAbort(); 
        } 
  
        Console.WriteLine("Thread is alive and working..!"); 
        Thread.Sleep(2000); 
        Console.WriteLine("Thread is finished its working..!"); 
    } 
} 
  
// Driver Class 
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        MyThread obj = new MyThread(); 
        Thread T = new Thread(obj.Job); 
        T.Start(); 
        Thread.Sleep(100); 
        Console.WriteLine("Aborting thread"); 
        T.Abort(); 
        T.Join(); 
        Console.WriteLine("Main thread ends"); 
    } 
} 

Output:

My Thread is working..!
Aborting thread
Caught ThreadAbortException and reset
Ex message: Thread was being aborted.
Thread is alive and working..!
Thread is finished its working..!
Main thread ends

Example 2:

// C# program to illustrate the 
// use of ResetAbort method 
using System; 
using System.Threading; 
  
// Driver Class 
public class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // Creating and initializing  threads 
        Thread thr = new Thread(Job); 
  
        // Start the execution of Thread 
        thr.Start(); 
  
        // Reset abort request 
        // Using ResetAbort method 
        Thread.ResetAbort(); 
    } 
  
    public static void Job() 
    { 
        Console.WriteLine("Hello"); 
    } 
} 

Runtime Error:

Unhandled Exception:
System.Threading.ThreadStateException: Unable to reset abort because no abort was requested.

Reference:

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

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