Threads in C# and access to variables

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I just discovered threads because I needed to have two independent while loops.

In my main program, I want to be able to create and start a thread that is able to modify local variables in the main thread. If I define "int number = 1;" in main, can a thread started in the main program access and modify number ? I envision multiple threads containing a while loop that run continuously checking and updating various variables.

What I have tried:

So far I have

int number = 1;

I think I know how to create thread objects that call on methods.

Posted 28-Aug-21 1:07am

Admin BTA

Updated 28-Aug-21 3:13am

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Richard MacCutchan 28-Aug-21 7:36am

Yes you can modify variables from multiple threads but you need to synchronise the threads, so that one does not overwrite the update of another.

Admin BTA 28-Aug-21 11:59am

Thanks, bro. Good one.

BillWoodruff 28-Aug-21 7:57am

This sounds to me like a scenario where you can use the parallel methods.

https://www.google.com/search?q=c%23+parallel+methods&rlz=1C1CHWL_enTH966TH966&sxsrf=AOaemvJK3KQFSluuRN2W1zmtEV5D89oGoA%3A1630151698854&ei=EiQqYY_GM7PDpgfY8JmgDA&oq=c%23+parallel+methods

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RickZeeland · Answer 1 · 2021-08-28T03:13:00

Solution 1

The recommended way nowadays is to use Tasks, when a Task completes you can put the result in a local variable. See this CodeProject article to get an idea:
The Basics of Task Parallelism via C#[^]
And also this series of articles: Task Parallel Library: 1 of n[^]

Posted 28-Aug-21 3:13am

RickZeeland

Updated 28-Aug-21 3:23am

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