Generic Binary Search in C#

Question

Below is my Generic Binary Search. It works okay with the integers type array (it finds all the elements in it). But the problem arises when I use a string array to find any string data. It runs okay for the first index and last index elements but I can't find the middle elements.

Stringarray = new string[] { "b", "a", "ab", "abc", "c" };

public static void BinarySearch<T>(T[] array, T searchFor, Comparer<T> comparer) {

        int high, low, mid;
        high = array.Length - 1;
        low = 0;
        if (array[0].Equals(searchFor))            
            Console.WriteLine("Value {0} Found At Index {1}",array[0],0);
        else if (array[high].Equals(searchFor))
            Console.WriteLine("Value {0} Found At Index {1}", array[high], high);
        else
        {
            while (low <= high)
            {
                mid = (high + low) / 2;
                if (comparer.Compare(array[mid], searchFor) == 0)
                {
                    Console.WriteLine("Value {0} Found At Index {1}", array[mid], mid);
                    break;
                }
                else
                {
                    if (comparer.Compare(searchFor, array[mid]) > 0)
                        high = mid + 1;
                    else
                        low = mid + 1;
                }

            }
            if (low > high)
            {
                Console.WriteLine("Value Not Found In the Collection");
            }
        }                 
    }