How to swap strings in a 2D array?

Question

C++ / C#

There is a two-dimensional matrix MxN and the user selects 2 rows to be swapped.
How to implement swapping of two strings?

Answer 1

string temp = matrix[m1,n1]
matrix[m1,n1] = matrix[m2,n2]
matrix[m2,n2] = temp