Difference between IS and AS keyword in C#

IS keyword is responsible for checks whether  an object is compatible with a given type and the result of the evaluation is a Boolean (true, false).

For example:

        public void emp()

        {

            Employee oEmp = new Employee();

            if (oEmp is Employee)

            {

            // your code

            }

        }

AS keyword is responsible for the casting of the object to a given type or class.

for Example :

Employee o = oEmp as Employee;