Visual Studio uses Publicize to create accessors public for private members and types of a type. But when you try to set elements of a private array of elements of a private type, things get complicated. Imagine this hypothetic class to test: public static class MyClass { private static readonly MyInnerClass...

Today, my friend Nuno was writing some code to get the PropertyInfo s of a class implementation of an interface. Given this interface: public interface ISomeInterface { int IntProperty { get ; set ; } string StringProperty { get ; } void Method(); } and this class: public class SomeClass : ISomeInterface...

In my last post , I went through what is variance in .NET 4.0 and C# 4.0 in a rather theoretical way. Now, I’m going to try to make it a bit more down to earth. Given: class Base { } class Derived : Base { } Such that: Trace .Assert( typeof ( Base ).IsClass && typeof ( Derived ).IsClass &&...

As part of the co-evolution effort of C# and Visual Basic , C# 4.0 introduces Named and Optional Arguments . First of all, let’s clarify what are arguments and parameters : Method definition parameters are the input variables of the method. Method call arguments are the values provided to the method...

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 COM -specific features were also added to 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 ) is piece of technology that unifies dynamic programming...

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 overloads is a maintenance nightmare, and you’re...

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 samples can be downlaoded from here . Here’s a list...

C# 4.0 (and .NET 4.0) introduced covariance and contravariance to generic interfaces and delegates. But what is this variance thing? According to Wikipedia , in multilinear algebra and tensor analysis, covariance and contravariance describe how the quantitative description of certain geometrical or physical...

The first release of C# ( C# 1.0 ) was all about building a new language for managed code that appealed, mostly, to C++ and Java programmers. The second release ( C# 2.0 ) was mostly about adding what wasn’t time to built into the 1.0 release. The main feature for this release was Generics . The third...