The Guthrie/Hanselman Conspiracy...

Free reusable generic Directory Poller utility class for .NET (especially useful when FileSystemWatcher is insufficent).

"Test Supported Development" (TSD) intends to characterize the creation of tests during ANY/ALL stages of development, that is, in TSD, tests are not necessarily created before their System Under Test (SUT), but not necessarily created at the end of development, either...

How to set up Gmail as a Free SPAM-filtering "router" for your domain email.

You may not realize that System.IO.File.Move() doesn't support overwriting of an existing file. In fact, it will throw an IOException if a file with the same path as sourceDestFilename already exists. Here is a wrapper method that does...

Example of how to overload operators in C#

Attain concise, highly-readable Ruby-like date syntax with C# 3.0 Extension Methods and Fluent Interface design.

A response to devizen's "Programming Can Ruin Your Life" essay.

Example code illustrating how to build a Fluent Interface in C#.

Instead of using a different Assert method for each different type of assertion (e.g.: Assert.AreEqual() for equality comparison, or Assert.IsTrue() for boolean evaluation), the new Constraint-Based Assert Model introduced in NUnit 2.4 utilizes only one Assert method named Assert.That().

You may be familiar with ROW_NUMBER(), but did you know you'll also need to combine that with a Common Table Expression (CTE) to paginate through your records?

Six Free Custom .NET String Manipulation Functions / Methods for Everyday Use

Free helper method to convert a SQL query to CSV format for easy output to a file, the console, or via a HttpResponse (for you ASP.NETers out there looking for an easy way to dynamically output a CSV for real-time data download).

Free SQL Server 2000/2005 function that will calculate the distance in miles between 2 latitude/longitude points for zip or address raduis search, etc.

Free .NET code that converts the contents of an ArrayList to a delimited string

Free code that determines if 2 lists (any objects that implement the IList interface, such as Array, ArrayList, ListBox, etc.) contain the same objects or value types.

Depending on your math background, .NET's rounding functionality may not work the way you expect! Check out the included code to implement an alternative (known as Common Rounding) in addition to .NET's built-in Math.Round() function.

With the recent mania over Web 2.0 and one of it's common bretheren, AJAX (BTW, Web 2.0 doesn't specifically dictate AJAX), there has been quite a proliferation of JavaScript frameworks (and frameworks built upon frameworks): prototype, moo.fx, MochiKit, DoJo, and more...

This is a convenient Javascript function that returns a value from a string of delimited values based upon the position index specified.

What do I mean by dynamic text form fields? Let's say I have a table Contacts that stores typical contact information for a Contact Management system...

Chris Pederick has developed one of the most useful extensions available to Gecko rendering engine browsers Firefox, Flock, and Mozilla.

This VB.Net code checks the validity of a credit card number. Pass a credit card number to the function and it returns true or false based upon the CC number's validity.

This is the C# code for an ASP.NET required validator web control that requires a specified set of controls to be all populated, or all empty. It inherits from the RequiredFieldValidator ASP.NET class, so it essentially works the same way, it just treats the set of controls you specify as if they were one control (in the sense of requirement).

Here is a free JavaScript trim() function for your use. Trim is a common function in other languages' syntax that removes leading and trailing spaces in a string. It does not exist in JavaScript as a built-in String function.

MSSQL Syntax for creating a comma-delimited string from a single column query using only a single SELECT statement

A very useful MSSQL Stored Procedure that will generate a cross tab (pivot table in the Excel world) output