Threads

Multiple threads are used to execute codes simultaneously. A process can have many threads.

Create 2 threads. See run.thread.

run.thread(() => {
	for (int i = 0; i < 10; i++) { 300.ms(); print.it(Environment.CurrentManagedThreadId); } //this code runs in a new thread
});
run.thread(() => {
	for (int i = 0; i < 10; i++) { 200.ms(); print.it(Environment.CurrentManagedThreadId); } //this code runs in another new thread
});
for (int i = 0; i < 10; i++) { 100.ms(); print.it(Environment.CurrentManagedThreadId); } //this code runs in the primary thread

Use thread pool threads.

#pragma warning disable CS4014 //here we don't want to wait for the task to end, like `async Task.Run...`, therefore disable the warning

Task.Run(() => {
	for (int i = 0; i < 10; i++) { 300.ms(); print.it(Environment.CurrentManagedThreadId); }
});
Task.Run(() => {
	for (int i = 0; i < 10; i++) { 300.ms(); print.it(Environment.CurrentManagedThreadId); }
});
for (int i = 0; i < 10; i++) { 100.ms(); print.it(Environment.CurrentManagedThreadId); }

Not all codes are safe to run in multiple threads simultaneously. Objects that aren't thread-safe may be corrupted. Use lock to prevent it.

var a = new List<int>();

Task.Run(() => {
	for (int i = 0; i < 100; i++) {
		10.ms();
		lock (a) {
			a.Add(i);
		}
	}
});
for (int i = 0; i < 100; i++) {
	11.ms();
	lock (a) {
		a.Add(i*100);
	}
}