ThreadStart is different from ParameterizedThreadStart.

ThreadStart is different from ParameterizedThreadStart.

ThreadStart:

ThreadStart is defined as void ThreadStart (). That is to say, the method to be executed cannot have parameters.

ThreadStart threadStart=new ThreadStart(Calculate);Thread thread=new Thread(threadStart);thread.Start();public void Calculate()   {　double Diameter=0.5;　Console.Write("The Area Of Circle with a Diameter of {0} is {1}"Diameter,Diameter*Math.PI);   }

Here we defineThreadStart type DelegationThis delegate develops the method to be executed by the thread: Calculate. In this method, calculates the circumference of a circle with a diameter of 0.5 and outputs the result. this constitutes the simplest example of multithreading, which is sufficient in many cases.

 

ParameterThreadStart:

ParameterThreadStart is defined as void ParameterizedThreadStart (object state). The startup function of the thread defined by this delegate can accept an input parameter. The example is as follows:

 

ParameterizedThreadStart threadStart=new ParameterizedThreadStart(Calculate)Thread thread=new Thread() ;thread.Start(0.9);public void Calculate(object arg){double Diameter=double(arg);Console.Write("The Area Of Circle with a Diameter of {0} is {1}"Diameter,Diameter*Math.PI);}

The Calculate method has a parameter of the object type. Although there is only one parameter and it is of the object type, type conversion is still required when using it, but fortunately there is a parameter, by combining multiple parameters into a class, and passing the instance of the class as a parameter, multiple parameters can be passed. for example:

 

 

class AddParams{    public int a, b;    public AddParams(int numb1, int numb2)    {      a = numb1;      b = numb2;    }}#endregionclass Program{    static void Main(string[] args)    {      Console.WriteLine("***** Adding with Thread objects *****");      Console.WriteLine("ID of thread in Main(): {0}",        Thread.CurrentThread.ManagedThreadId);      AddParams ap = new AddParams(10, 10);      Thread t = new Thread(new ParameterizedThreadStart(Add));      t.Start(ap);      Console.ReadLine();    }    #region Add method    static void Add(object data)    {      if (data is AddParams)      {        Console.WriteLine("ID of thread in Main(): {0}",          Thread.CurrentThread.ManagedThreadId);        AddParams ap = (AddParams)data;        Console.WriteLine("{0} + {1} is {2}",          ap.a, ap.b, ap.a + ap.b);      }    }    #endregion}}