IN C#:

C# ONLY

Here is a program that I need to that involves doing a sudoko puzzle. I have included the instructions below.

INSTRUCTIONS:

A few years ago, a style of puzzle became pretty popular. The name most people know it by is Sudoku. If youve played it, you know the rules. Ill give them here in a nutshell. The user starts with a 9x9 grid. That grid is split into nine 3x3 blocks. There are a handful of cells filled in. The goal of the game is to fill in all the cells such that the following three rules are true:

each column uses each digit (1-9) exactly once

each row uses each digit exactly once

each of the 3x3 blocks uses each digit exactly once

Here are examples of a starting grid and a solution (lifted from Wikipedia).

"Sudoku-by-L2G-20050714 solution" by en:User:Cburnett

Your mission, should you choose to accept it, is to determine whether a given Sudoku answer is correct. This means that you will need to validate the three rules above for the given puzzle answer.

The puzzle will be in a .txt file. It will have nine rows of nine digits. The digits will be separated by commas. You will need to place the digits into a 9x9 two dimensional array. Then you will need to check each of the rules on the array. The numbers used will be 1-9. You do not need to worry about numbers outside the range.

At the end, you need to output VALID or INVALID. If the answer is invalid, you should write where you found it to be invalid. You must continue on to find and report all invalid locations, e.g.

ROW 0

COL 4

BLK 1

The rows are numbered left to right, the columns top to bottom, the blocks left-to-right, top to bottom, all starting with zero,

To be clear the blocks are numbered:

0	1	2
3	4	5
6	7	8

There are a number of txt files attached to the assignment, one good solution and a number of bad ones. There are notes in the file that give the expected errors. You may find these useful for testing your program. You are encouraged to create other good (and bad) solutions for further testing. Also, feel free to use any data structures in addition to a two-dimensional array that will help you in your validation.

Use good programming practices as you solve this problem. As always, you will be graded on efficiency, maintainability, etc. as well as correctness. Do not do this all in one big loop. Write methods to test each portion, e.g. one to test rows, one to test columns, etc. If you do not, you will find it difficult to think through your program logically; it will also be harder to maintain when your employer wants to add a killer Sudoku checker.

As always, you will be graded on good programming practices, efficiency, clarity, etc.

For a grade of B:

Report all invalid Rows and Columns.

For a grade of A:

Also report all the invalid Blocks.

Below is the txt files that was sent with the instructions. I don't know how to even start this program so please help me complete this so that I can get an 'A' on this program.

Suduko-bad-1.txt:

2,1,5,6,4,7,3,9,8 3,6,8,9,5,2,1,7,4 7,9,4,3,8,1,6,5,2 5,8,6,2,7,4,9,3,1 1,4,2,5,8,3,8,6,7 9,7,3,8,1,6,4,2,5 8,2,1,7,3,9,5,4,6 6,5,9,4,2,8,7,1,3 4,3,7,1,6,5,2,8,9

INVALID ROW: 4 COL: 4 BLK: 4

Suduko-bad-2.txt:

2,1,5,6,4,7,3,9,8 3,6,8,9,5,2,1,7,4 7,9,4,3,8,1,6,5,2 5,8,6,2,7,4,9,3,1 1,4,2,5,9,3,8,6,7 9,7,3,8,1,6,4,2,5 8,2,1,7,3,9,5,4,6 6,5,9,4,2,8,7,1,3 4,3,7,6,1,5,2,8,9

INVALID COL: 3 COL: 4

Suduko-bad-3.txt:

2,1,5,6,4,3,7,9,8 3,6,8,9,5,1,2,7,4 7,9,4,3,8,6,1,5,2 5,8,6,2,7,9,4,3,1 1,4,2,5,9,8,3,6,7 9,7,3,8,1,4,6,2,5 8,2,1,7,3,5,9,4,6 6,5,9,4,2,7,8,1,3 4,3,7,1,6,2,5,8,9

INVALID BLK: 1 BLK: 2 BLK: 4 BLK: 5 BLK: 7 BLK: 8

Suduko-bad-4.txt:

2,1,5,6,4,7,3,9,8 3,6,8,9,5,2,1,7,4 7,9,4,3,8,1,6,5,2 5,8,6,2,7,4,9,3,1 1,4,2,5,9,3,8,6,7 9,7,3,8,1,6,4,2,5 8,2,1,7,3,9,5,4,6 6,5,9,5,2,8,7,1,3 4,3,7,1,6,4,2,8,9

INVALID ROW: 7 ROW: 8 COL: 3 COL: 5

Suduko-good.txt:

2,1,5,6,4,7,3,9,8 3,6,8,9,5,2,1,7,4 7,9,4,3,8,1,6,5,2 5,8,6,2,7,4,9,3,1 1,4,2,5,9,3,8,6,7 9,7,3,8,1,6,4,2,5 8,2,1,7,3,9,5,4,6 6,5,9,4,2,8,7,1,3 4,3,7,1,6,5,2,8,9

Like I said, I don't know what the text files are suppose to be used for but can you please help me figure out this program so that I can get an 'A' on it.