c# bubble sort string array
You can use string.Compare(x,y) instead of <, which returns 0 if the string are equal, otherwise an integer that indicates their relative position in the sort order
for (int index = 0; index < (letters.Length - 1); index++)
{
if (string.Compare (letters[index], letters[index + 1]) < 0) //if first number is greater then second then swap
{
//swap
temp = letters[index];
letters[index] = letters[index + 1];
letters[index + 1] = temp;
swap = true;
}
}
If you want to ignore case during the comparison, you should use string.Compare (letters[index], letters[index + 1], true)