C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
using System.Threading;
using System.Threading.Tasks;
class Program
{
       static async Task Main(string[] args)
    {
        var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));

        try
        {
            var task = SaySomethingAsync(10);
            await task.WaitAsync(cts.Token);
            
            if (task.IsCompletedSuccessfully)
            {
                Console.WriteLine(task.Result);
            }
        }
        catch (OperationCanceledException ex)
        {
            Console.WriteLine("Operation cancelled.");
        }

        Console.ReadKey();
    }

    static Task<string> SaySomethingAsync(int secondsDelay)
    {
        return Task.Run(() =>
        {
            var iterations = 0;
            while (iterations != secondsDelay)
            {
                iterations++;
                Console.WriteLine($"....{iterations}");
                Thread.Sleep(TimeSpan.FromSeconds(1));
            }

            return "Something!";
        });
    }
}

​x
 
using System;
using System.Threading;
using System.Threading.Tasks;
class Program
{
       static async Task Main(string[] args)
    {
        var cts = new CancellationTokenSource(TimeSpan.FromSeconds(5));
​
        try
        {
            var task = SaySomethingAsync(10);
            await task.WaitAsync(cts.Token);
            
            if (task.IsCompletedSuccessfully)
            {
                Console.WriteLine(task.Result);
            }
        }
        catch (OperationCanceledException ex)
        {
            Console.WriteLine("Operation cancelled.");
        }
​
        Console.ReadKey();
    }
​
    static Task<string> SaySomethingAsync(int secondsDelay)
    {
        return Task.Run(() =>
        {
            var iterations = 0;
            while (iterations != secondsDelay)
            {
                iterations++;
                Console.WriteLine($"....{iterations}");
                Thread.Sleep(TimeSpan.FromSeconds(1));
            }
​
            return "Something!";
        });
    }
}

Roslyn 2.0 Compiler; Environment version: 4.0.30319.42000

<?xml version="1.0" encoding="utf-16"?>
<data someattributea="" someattributeb="" someattributec="" ExtraAttr="" xmlns:p1="http://SomeTestNamespace.com" p1:someattributec="namespace attr" />
<?xml version="1.0" encoding="utf-16"?>
<data someattributea="replacement value for Someattributea" someattributec="" ExtraAttr="" xmlns:p1="http://SomeTestNamespace.com" p1:someattributec="namespace attr" />

Testing a list of Data.
<?xml version="1.0" encoding="utf-16"?>
<DataList xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <DataItem someattributea="" someattributeb="" someattributec="" ExtraAttr="" xmlns:p1="http://SomeTestNamespace.com" p1:someattributec="namespace attr" xmlns="https://Test Namespace" />
  <DataItem someattributea="" someattributeb="" someattributec="" ExtraAttr="" xmlns:p1="http://SomeTestNamespace.com" p1:someattributec="namespace attr" xmlns="https://Test Namespace" />
</DataList>
<?xml version="1.0" encoding="utf-16"?>
<DataList xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <DataItem someattributea="" someattributeb="" someattributec="" ExtraAttr="" xmlns:p1="http://SomeTestNamespace.com" p1:someattributec="namespace attr" xmlns="https://Test Namespace" />
  <DataItem someattributea="" someattributeb="" someattributec="" ExtraAttr="" xmlns:p1="http://SomeTestNamespace.com" p1:someattributec="namespace attr" xmlns="https://Test Namespace" />
</DataList>

Cached Result
Last Run:	11:19:14 pm
Compile:	0.22s
Execute:	0.031s
Memory:	3.61Mb
CPU:	0.078s

View IL Code