Now that Whidbey has been out in Beta for more than a few months, it seems worth revisiting some frequently asked questions which have different (better?) answers now. In Everett (v7.1) the answer used to be No. However, in Whidbey (v8.0), the answer...

In the unmanaged world, it was quite common to intercept Win32 messages as they were plucked off the message queue. In that rare case in which you wish to do so from a managed Windows Forms application, your first step is to build a helper class which...

Given that the .NET platform encourages binary reuse of types, it is commonplace to set references to external assemblies using the Visual Studio .NET Add Reference dialog box. Many programmers (especially those of the C(++) ilk) fear that adding unnecessary...

Okay, I admit this is a rather lame tip which can hardly qualify as 'insightful', however this is one of my favorite features of Visual Studio .NET (as well as previous editions of the Visual Studio product line) which many folks are (surprisingly) unaware...

Like other languages in the C-family, C# supports a set of 'preprocessor' directives , most notably #define , #if and #endif (technically, csc.exe does not literally have a preprocessor as these symbols are resolved at the lexical analysis phase, but...

You are already aware that the C# using keyword allows you to supply hints to the compiler regarding the fully qualified name of the types within a given *.cs file. However, what you may not know is that the using keyword also allows you to build aliases...

The term 'best practices' sends chills up the spines of many people. Reason being, what is 'best' for one is 'horrible' for another. However, if you are interested in ensuring that your custom .NET assemblies are in-sync with the coding guidelines proposed...

Another helpful feature of VS .NET 2003 has to do with the implementation of interface types. As you know, when a class or structure agrees to implement a given interface, it must implement all of the members. Assume you wish to support an interface containing...

Working with events under the .NET platform requires you to be aware of a number of details. For example, if you know the name of the event you wish to handle, you must then know the name of the related delegate type. Once you know that much, you must...

VS .NET allows you to add any number of external tools to the Tools menu. One very helpful technique is to configure ildasm.exe to automatically load up the current assembly being compiled. While VS .NET 2003 sets this up automatically, VS .NET 2002 may...

As you most likely know by now, the Add References dialog of Visual Studio .NET does not list each and every assembly on your machine, does not directly map to the Global Assembly Cache and does not list your custom assemblies. Typically this limitation...

Although I'd bet most of you make use of VS .NET as opposed to the raw command line complier, csc.exe can be quite useful in a number of circumstances. However, few of us enjoy typing lengthy command line flags such as: csc /r: MyAsm.dll;MyOtherAsm...

When you install the .NET SDK / VS.NET, you are provided with numerous stand alone programming tools, one of which is named wincv.exe ( Windows Class Viewer ). Many developers are unaware of wincv.exe, as it is buried away under the C:\Program Files\Microsoft...

Visual Studio .NET provides a very interesting view of the world named the Server Explorer (which can be activated from the View menu). While you may already be aware many of these items can be opened within VS .NET for editing (for example, opening a...

All .NET assemblies contain vivid type information which describes the structure of every internal and external type (this can be verified by loading an assembly into ildasm.exe and clicking the ctrl-m keystroke). On a related note, many methods in the...

Like the C++ language, C# allows you to overload operators for your custom types. For example, assume you have a structure named MyPoint which has overloaded the plus operator. If this is the case, you can 'add' two MyPoints as so: // Add two MyPoint...

The following code won't work, because conn goes out of scope before you enter the catch block. try { Connection conn = new Connection(); conn.Open(); } catch { if (conn != null ) conn.Close(); } The fix is simple - just declare conn before entering the...

There was a suggestion/question on the Product Feedback site for VS2005 that suggested that the params keyword may not be that well understood. The params keyword can be applied on a method parameter that is an array. When the method is invoked, the...

Where you once used Regsvr32 on unmanaged COM libraries, you will now use Regasm on managed .NET libraries. “ Regsvr32 is the command-line tool that registers .dll files as command components in the registry“ “Regasm.exe, the...

No. While Generic types do have a similar syntax to C++ templates, they are instantiated at runtime as opposed to compile time, and they can be reflected on via meta-data. Also, in Generics, member access on the type paramater is verified based on...

C# does not support an explicit fall through for case blocks (unless the block is empty) For an explanation of why, see Why is the C# switch statement designed to not allow fall through, but still require a break? on MSDN The following code is not...

Q: Why does C#'s iterators feature spit out a class definition instead of a struct definition? The iterators feature in C# generates classes that implement the enumerators required. This is detailed in the C# Specification . Why doesn't it use structs...

Posted by: Duncan Mackenzie , MSDN This post applies to Visual C# .NET 2002/2003 Suppose you want to run a command line application, open up another Windows program, or even bring up the default web browser or email program... how can you do this from...

You can use the Convert class or the Parse method of the built-in type you are casting to. i.e. string myStr = "123"; int myParsedInt = Int32.Parse(myStr); int myConvertedInt = Convert.ToInt32(myStr); This example uses the int type, but you can also...

Q: How are multiple return values from a delegate handled? In C#, it's possible to write a delegate such as: delegate double GetResult(params double p); If there is more than one method on this delegate, there are multiple return values. A...