In day to day coding, I found myself using a lot of disposable objects like DbConnection, Font, etc. And so, naturally, putting this code block inside a using statement is common sense. In theory, I know that when you use a using block in your code, your code is guaranteed to be disposed without having...

I wonder how many of us litter our code with this particular line? How do you use them? Do you know what you need to watch out when you do use them? Is it necessary to put this line of code in our code? What is the consequence of putting this line into your code? What's the right way to use Debug...

This seems like pretty basic functionality of a number type, but I can't seem to be able to find any built-in function in any of .Net number type that support decimal (decimal, double) or the System.Math class to do this. In any case, if you find yourself in need to find out if a number has a decimal...

When you use .NET Activator.CreateInstance to create a new object of a certain type, make sure you reference the Project / DLL that contain the type definition or load it manually somehow to an AppDomain . Otherwise your call will fail. Say you have the following solution: Solution Foo Project Bar1 IUser...

I was reading this particular entry from AlexJ's blog, in which he discussed how to use anonymous type returned from one function in another function. I strongly recommend you read it first before reading any further. Basically, most people would think that there is no easy way to return a strongly...

Here's I am going to write something about the evolution of Delegate, Anonymous Method, till Lambda Expression. Here's I will use a build in delegate, Predicate<T> to give the example. My example is simple. There's a collection of integer (I call it intList). I fill it up with numbers...

Yesterday morning I join MSDN Day - Visual Studio 2008. The first session is the most interesting one that I've been waiting for times. Yeah C# 3.0. Mr Norman presented "what's new in C# 3.0". It was great. At the evening, I trained about .NET Framework and C# 2.0 to others BinusCenter's...

We often need collection in our programming. To implement collection, we have two choices: fixed-length collection which is familiarly "array" and dynamic length collection. One of the popular dynamic collections is ArrayList. ArrayList (actually Queue, Stact, other collection also) accepts...

Most of people begin in ASP and VB6 before step in to .NET. I myself, vice versa. I had learned .NET first, then later came with VB6. Last week I began a Bina Nusantara Cooperate website ( http://www.binus.edu/ ) with ASP.NET and C# (was developed by ASP). This is not a huge or enterprise project, where...

In my last post, I described what interface and abstract class are, how to create and use them. But, the question is “Why do we need to use interface or abstract class?”, “Is it useful?”, “What if we don’t use them?”. Actually, the primary reason of using them...