RadNumericTextBox is a really great server control provided by telerik.com. This is an input control which only accepts numeric inputs. Not only that, it also support formatting like it adds automatically commas and decimals.
.Net
Create Shapes using ASP.Net

On this article we will show you how to create/draw basic shapes (that would be Circle, Triangle, Rectangle, and Square) using ASP.Net on a website. We will also set/compute the area, radius (for Circle), base(for Triangle), and some other operations that is related to a specific shape.
To get started we will create a Point2d class, this class handles the creation of X and Y coordinates.
ASP.Net Membership and Role Provider with Facebook Connect (Part 2)

[Update: 6/23/2009 Included the code]
This is the second part of this article. This part will now demonstrate how to integrate the facebook connect to our existing website. Be sure to read the Part 1 of this article as we will be using the website that we have created on that part. We will be integrating Facebook Connect on that website.
ASP.Net Membership and Role Provider with Facebook Connect (Part 1)

This is a two part article that will teach you how to create an ASP.Net web application with Membership and Role Provider and integrate Facebook connect to it. We will be using Visual Studio 2008 on this one.
The first part is creating/setting up Membership and Role Provider to your web application. OK then let us start up.
Setting up ASP.Net Membership and Role Provider
First we need to create a website and on our example let us just call it “MyWebsite”.
ChangeConflictException: Row not found or changed.

While I was working and for the first time I got this error. It was really frustrating because all that I was just doing was simply updating a record using LINQ.
Example:
