Need with Programming language in C#

Can someone help Create an Application using C#. Which Adds, Edits, and Deletes assignments onto a storage medium, with grades per student-per assignment.

Assignments must be separated into 2 groups- Homework and Test. Grades for each group per student must be calculated along with an overall grade for each student (given in both percentage and Letter grade).

a. Program must include

i. Subprograms with parameter passing

ii. Abstract Data types

iii. Encapsulation

iv. Exception/ Error Handling

v. Must verify only valid scores are entered per assignment

vi. Documented for maintenance purposes