Checking whether value is entered into a control and preventing focus to go out if no value is entered.

EventViewer can be accessed by Selecting Event Viewer from Administrative Tools of Control Panel. This code snippet will add an Entry called Shalvin inside the Application section.

CAS is the programatically means by which you secure the resouce of a system like file system, printer, registry, etc. in contrast to Role Base Security (RBS)

Serialization is the process of saving the state of an object into persistant medium.
BinaryFormatter class is used for serializing and deserializing an object.

HybridDictionary is optimized for...

Though .Net classes are vast and versatile at time you will have to resort to Win32 API calls for accomplishing certain tasks.

The following code shows a simple example of invoking a Win32 api. ...

TreeView was one of my favourite control in COM. It is well suited for creating Chart of Accounts, Hierarchical data and the like. Though there is a tree view in .Net I find it less flexible in...