Tutorials Place

What is a NullReferenceException, and how do I fix it? The developer is using null intentionally to indicate there is no meaningful value available. Note that C# has the concept of null able datatypes for variables (like database tables can have nullable fields) - you can assign null to them to indicate there is no value stored in it,

Private variables and functions in JavaScript:

Email Address Validation for ASP.NET ( Validation Using Regular Expression):

Validation control using JavaScript:  

Code for java script validation: