List of C Sharp Kata to Update

The following kata needs to fixed to enable C# 7.3. Any help will be appreciated.

1. 2-Sum Sums
2. 5 without numbers !!
3. Aurecchia Mathematical question chapter 1
4. Basics 07: Calculate Sin(x) - too easy?
5. Between Extremes
6. change for pizza
7. Count the likes
8. Create a simple Class at Runtime
9. Dictionary Merge
10. Fibonacci
11. Fibonacci sequence with Linq
12. Graphics 04: Complete Function Grapher (~15 Lines of Code?!)
13. Is number a palindrome?
14. Leap year
15. Linear equations N x M, complete solution space, fraction representation
16. Number Zoo Patrol
17. Padovan numbers
18. Palindrome chain length
19. Pell Numbers
20. Polygon Orientation
21. Reflection #2 - Give me all methods
22. Reflection #3 - Add the member-results
23. Reflection #4 - Complete-Invoke
24. RunTime Compiler
25. Simple Fun #174: Unlucky Number
26. Simplexer
27. To buy or not to buy
28. Whos the TIC TAC TOE champion?