Useful Code – Insertion Sort with C#

In this implementation, the InsertionSort function iterates over the input array from the second element (index 1) to the end. For each element, it compares it to the elements before it (starting from the previous element at index i-1) and inserts it into its correct position in the sorted subarray. The function maintains a key variable to hold the current element being sorted and a j variable to keep track of the position to insert the element.

Note that while Insertion Sort is simple and easy to implement, it is not the most efficient sorting algorithm for large inputs. It has a worst-case time complexity of O(n^2) and is generally used for small inputs or as a subroutine in more complex sorting algorithms.

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