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News kaleidoscope 1817, lit. "observer of beautiful forms," coined by its inventor, Sir David Brewster (1781-1868), from Gk. kalos "beautiful" + eidos "shape" (see -oid) + -scope, on model of telescope, etc. Figurative meaning "constantly changing pattern" is first attested 1819 in Lord Byron, whose publisher had sent him one.

Kaleidoscope Everything under the sun, ending in .Net July 2010 Entries
Design Pattern Series – Factory Pattern
Creational design patterns were introduced in order to avoid the inherent tight coupling between the classes which were stemmed up from the excessive creation of objects of one class by the other class. Factory pattern is one of the most widely used creational patterns. This pattern calls for the use of a specialized object solely to create other objects, much like a real-world factory. In the above figure, the client is an object that requires an instance of another object (the product) for some ......

Posted On Thursday, July 8, 2010 10:10 PM

IntelliTrace is a new and very interesting feature of Windows Azure Tools SDK, June 2010 release. It, along with its other features, enables debugging of application in the cloud. This feature is available in Microsoft Visual Studio 2010 Ultimate only. IntelliTrace provides an enhanced picture of the application compared to the traditional debugging. Traditional Debuggers provides the current state of the application with very limited information of the events occurred in the past. While, IntelliTrace ......

Posted On Thursday, July 1, 2010 12:57 AM

Steps to Implement Validations in MVVM design pattern in a WPF Applications:
Here I am trying to provide step wise approach of implementing validations using IDataErrorInfo interface. Steps to be carried out in ViewModel and Model classes: Add reference to System.ComponentModel namespace. Implement IDataErrorInfo interface in ViewModel and Model classes Create sub routine for checking validations on Fields in ViewModel and Model classes Sample Code in ViewModel class: Steps to be following in XAML: Set the ValidatesOnDataErrors property true for all the data entry controls. ......

Posted On Thursday, July 1, 2010 12:35 AM

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