static in C# or
Shared in VB.Net
static - C# ( case
sensitive ) / Shared in VB.Net is a modifier, with class scope.
Member declared with this modifier cannot be accessed by the object
of the class. This modifier is used with other Access Modifiers like
private, public, internal, protected, and protected internal.
static / Shared
variable gets the scope of application, not the current session of a
specific user.
When we want to maintain application
level data, we will use variables declared with this modifier.
Example: When we
want to maintain the no of active users on our website, we will store
the value in a static variable. Whenever a new user logs into the
application we will increase the value or decrease it when one
leaves.
We should not use this to maintain
the data of a specific user.
Example: if we store
the current user name in static variable at the time of login, and
then it will always give the most recent logged in user name as
current username.
