Page 124 - CSharp/C#

// return something as a "result"
return new Random().Next(100);
}

Thread

See below for a simple example of how to use a Thread to do some time intensive stuff in a
background process.

public async void ProcessDataAsync()
{
// Start the time intensive method
Thread t = new Thread(TimeintensiveMethod);

// Control returns here before TimeintensiveMethod returns
Console.WriteLine("You can read this while TimeintensiveMethod is still running.");
}

private void TimeintensiveMethod()
{
Console.WriteLine("Start TimeintensiveMethod.");

// Do some time intensive calculations...
using (StreamReader reader = new StreamReader(@"PATH_TO_SOME_FILE"))
{
string v = reader.ReadToEnd();

for (int i = 0; i < 10000; i++)
v.GetHashCode();
}
Console.WriteLine("End TimeintensiveMethod.");
}

As you can see we can not return a value from our TimeIntensiveMethod because Thread expects a
void Method as its parameter.

To get a return value from a Thread use either an event or the following:

int ret;
Thread t= new Thread(() =>
{
Console.WriteLine("Start TimeintensiveMethod.");

// Do some time intensive calculations...
using (StreamReader reader = new StreamReader(file))
{
string s = reader.ReadToEnd();

for (int i = 0; i < 10000; i++)
s.GetHashCode();
}
Console.WriteLine("End TimeintensiveMethod.");

// return something to demonstrate the coolness of await-async
ret = new Random().Next(100);
});

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