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Here are the materials from my What’s New In C# 5.0 session at the Rumos InsideOut Event . Slide deck: What's New In C# 5.0 from Paulo Morgado Sample code: C# 5.0 Async/Await Demo Code
I’ve published the sample code I use to demonstrate the use of async / await in C# 5.0. You can find it here . Projects PauloMorgado.AyncDemo.WebServer This project is a simple web server implemented as a console application using Microsoft ASP.NET Web...
The C# Language Specification states on §7.5.1.2 that “(…) the expressions or variable references of an argument list are evaluated in order, from left to right (…)”. So, when this code is compiled with the C# 4.0 compiler: static void M( int x = 10,...
The Roslyn team has announced general availability of the Roslyn CTP ! The official launch is at http://msdn.com/roslyn , and there were a number of blogs to publicize the availability broadly ( soma , ericli , vsteam , vbteam , c#faq ) and across twitter...
In a previous post I showed how to create expression trees to set properties on an object. The way I did it was not very developer friendly. It involved explicitly creating the necessary expressions because the compiler won’t generate expression trees...
Following my last posts ( > )( > ), in this post I’ll introduce the implementation of the SkipLastWhile operator. The SkipLastWhile returns all but the last contiguous elements from a a sequence that satisfy the specified criteria and is implemented...
Following my last post , in this post I’ll introduce the implementation of the SkipLast operator. The SkipLast operator returns all but a specified number of contiguous elements from the end of a sequence and is implemented as the SkipLast extension method...
After having introduced the TakeLast operators ( > )( > )( > ), it makes sense to introduce their duals: the SkipLast operators. Name Description Example SkipLast<TSource>(IEnumerable<TSource>) Returns all but a specified number of...
Following my last posts ( > )( > ), in this post I’ll introduce the implementation of the TakeLastWhile operator. The TakeLastWhile operator returns last contiguous elements from a sequence that satisfy the specified criteria and is implemented...
Following my last post , in this post I’ll introduce the implementation of the TakeLast operator. The TakeLast operator returns a specified number of contiguous elements from the end of a sequence and is implemented as the TakeLast extension method :...
To finalize this series on object hydration, I’ll show some performance comparisons between the different methods of hydrating objects. For the purpose of this exercise, I’ll use this class: class SomeType { public int Id { get ; set ; } public string...
In my previous post I showed how to hydrate objects by creating instances and setting properties in those instances. But, if the intent is to hydrate the objects from data, why not having an expression that does just that? That’s what the member initialization...
After my post about dumping objects using expression trees , I’ve been asked if the same could be done for hydrating objects. Sure it can, but it might not be that easy. What we are looking for is a way to set properties on objects of an unknown type...
Following my last post , I received lots of enquiries about how got to master the creation of expression trees . The answer is: .NET Reflector On that post I needed to to generate an expression tree for this expression: Expression < Func < object...
No. I’m not proposing to get rid of objects. A colleague of mine was asked if I knew a way to dump a list of objects of unknown type into a DataTable with better performance than the way he was using. The objects being dumped usually have over a...
In a previous post , I went through how arrays have are covariant in relation to the type of its elements, but not safely covariant. In the following example, the second assignment is invalid at run time because, although the type of the objectArray variable...
I would like to thank those that attended my session at TechDays 2010 and I hope that I was able to pass the message of what’s new on C# . For those that didn’t attend (or did and want to review it), the presentation can be downloaded from here . Code...
Dynamic resolution as well as named and optional arguments greatly improve the experience of interoperating with COM APIs such as Office Automation Primary Interop Assemblies (PIAs) . But, in order to alleviate even more COM Interop development, a few...
Filed under: .NET, SoftDev, C#, Events, Microsoft, MSDN, Techdays, .NET4.0, TechDaysPT10, CodeProject, C#4.0
The major feature of C# 4.0 is dynamic programming. Not just dynamic typing, but dynamic in broader sense, which means talking to anything that is not statically typed to be a .NET object. Dynamic Language Runtime The Dynamic Language Runtime ( DLR )...
Filed under: .NET, SoftDev, C#, Events, Microsoft, MSDN, Techdays, .NET4.0, TechDaysPT10, CodeProject, C#4.0
Like I mentioned in my last post , exposing publicly methods with optional arguments is a bad practice (that’s why C# has resisted to having it, until now). You might argument that your method or constructor has to many variants and having ten or more...
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