Question: Write the program that calculates the sum of the elements in the penultimate row and column of the A matrix of type NxN entered from

Write the program that calculates the sum of the elements in the penultimate row and column of the A matrix of type NxN entered from the keyboard.
(With c# please)
sample:
Write the program that calculates the sum of the elements in the

T=a13+a23+a33+a31+a32+a33 A= a11 a12 a13 a14 a21 a22 a23 a24 a31 a32 33 a41 42 a43 a44 a34

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