General code improvements.

[ShreyasJejurkar]

1. Fixed method name violation.
2. Removed redundant code statements.
3. Removed unused using.
4. Removed redundant argument name.
5. Removed multiple enumerations happening code.
6. Converted to method group.
7. Removed unwanted white-space from code.
8. Converted foreach to LINQ statements.
9. Added check for null conditional access.
10. Fixed spelling typos.
11. Removed redundant code initializers.
12. Removed unwanted commos.