Paulo Morgado

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.

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).

As part of the co-evolution effort of C# and Visual Basic, C# 4.0 introduces Named and Optional Arguments.

In my last post, I went through what is variance in .NET 4.0 and C# 4.0 in a rather theoretical way.

C# 4.0 (and .NET 4.0) introduced covariance and contravariance to generic interfaces and delegates. But what is this variance thing?

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.

On my last post, I introduced the PredicateEqualityComparer and a Distinct extension method that receives a predicate to internally create a PredicateEqualityComparer to filter elements.

Today I was writing a LINQ query and I needed to select distinct values based on a comparison criteria.