First, the decoupling of .NET from Windows
Second, the newfound focus on CLR performance
Third, moving .NET’s tooling to a cross-platform model
Fourth, the .NET user base is embracing the OSS ecosystem as a whole
Fifth, in general the direction on .NET development is pushing users further down into the details of the stack
Sixth, Microsoft’s platform work being done out in the open
There are a variety of ways to determine what programming language is most popular. One is to do surveys and simply ask people what they think is most popular. We've done that on our developer sites. Another method is using the Tiobe index listings.
What is concurrent programing? Simply described, it’s when you are doing more than one thing at the same time. Not to be confused with parallelism, concurrency is when multiple sequences of operations are run in overlapping periods of time. In the realm of programming, concurrency is a pretty complex subject. Dealing with constructs such as threads and locks and avoiding issues like race conditions and deadlocks can be quite cumbersome, making concurrent programs difficult to write. Through concurrency, programs can be designed as independent processes working together in a specific composition. Such a structure may or may not be made parallel; however, achieving such a structure in your program offers numerous advantages.
var i = 28; TypedReference tr = __makeref( i ); Type t = __reftype( tr ); Console.WriteLine( t ); int rv = __refvalue( tr, int ); Console.WriteLine( rv ); ArglistTest.DisplayNumbers( __arglist( 1, 2, 3, 5, 6 ) );
public static class ArglistTest
{
public static void DisplayNumbers( __arglist )
{
var ai = new ArgIterator( __arglist );
while ( ai.GetRemainingCount() > 0 )
{
var tr = ai.GetNextArg();
Console.WriteLine( TypedReference.ToObject( tr ) );
}
}
} Console.WriteLine( "NewLine: {0}first line{0}second line{0}third line", Environment.NewLine ); ExceptionDispatchInfo possibleException = null;
try
{
int.Parse( "a" );
}
catch ( FormatException ex )
{
possibleException = ExceptionDispatchInfo.Capture( ex );
}
possibleException?.Throw(); Debug.Assert(1 == 0, "عدد 1 برابر با 0 نیست");
Debug.WriteIf( 1 == 1, "display message in output window :D" );
Debug.WriteLine("تست تورفتگی");
Debug.Indent();
Debug.WriteLine("یک واحد افزایش داده شد");
Debug.Unindent();
Debug.WriteLine("یک واحد کاهش داده شد");
Debug.WriteLine("پایان تست"); 
The new .NET framework is modern, lean, modular and open source. No longer is .NET a system-wide installation – it is merely a folder. Instead of a huge underlying framework, you only pick and choose the pieces of the .NET framework that you need in your apps. And more importantly, you can package the required components of the .NET framework right alongside your app. We’re entering an age of app-runtime silos and ultimate portability.
Immutability comes with a lot of benefits, but sometimes it can be a bit cumbersome to deal with when you only want to update some properties. Since the object is immutable, you need to create a copy with all the existing values and the new updated one.
I will show you how Records in C# 9 will greatly simplify this
Orleankka is a functional extension for Microsoft Orleans framework. It provides a message-based API similar to Akka/ProtoActor, carefully layered on top of Microsoft Orleans (that's what in a name). Orleankka is an excellent choice for use-cases which can benefit from composable, uniform communication interface, such as CQRS, event-sourcing, FSM, etc.
In C#, null has no type, but most variables can be null; you can't really trust the type system. A Maybe, on the other hand, always has a type, which means that Maybe is a saner approach to the question of values that may or may not be present.
