For connection

For connection

For connection

For connection

For connection

For connection

For connection

For connection

For connection

For connection

for implementing IDisposabel interface

using keyword can use two places 1.) when adding a namespace 2.) dispose the object automatically when the class implement idisposable interface.

“Using” statement calls – “dispose” method internally, whenever any exception occurred in any method call and in “Using” statement objects are read only and cannot be reassignable or modifiable.