Question

I am doing a multi-threaded application in C# and need to pass some parameters to a thread.

Attempting to use the ParameterizedThreadStart class so that I can pass a class variable (which contains all the parameters I want to pass). However, the class seems to be unrecognised (there is a red line underneath it in the source code) and on compilation I got a “The type or namespace name ParameterizedThreadStart could not be found (are you missing a using directive or an assembly reference?)”.

I am using the following libraries from the framework:
using System;
using System.Collections;
using System.Threading;

Am I doing anything wrong? I am using VS 2003 (7.1.6030) and .NET Framework 1.1.

Thank you.

Answer 1

That ParameterizedThreadStart type not exists before .net framework 2.0, but you can accomplish the same goal (pass parameters to thread) creating a simple class and using good old ThreadStart delegate, like the following:

class ParamHolder
{
    private object data;

    public ParamHolder(object data) // better yet using the parameter(s) type
    {
        this.data = data;
    }

    public void DoWork()
    {
        // use data
        // do work
    }
}

and the use will be:

...
object param = 10; // assign some value
Thread thread = new Thread(new ThreadStart(new ParamHolder(param).DoWork));
thread.Start();
...