In C Sharp Please!

$1.$ Write a code to find all the following operations in one program $($use separate methods for each operation$)$

$-$Divide $2$ numbers to find quotient and remainder

$-$Multiply two numbers

$-$Subtract two numbers

$2.$ Write the first program again and now by using classes.

$3.$ Find the sum of ten elements in array using foreach loop.

$***$ Make sure to input the values using readline and not take

constant values in all three programs.

$***$Submit the code not the output

$***$They are three separate programs so submit three

separate $.$cs files