Taking large (1 million) number of substring (100 character wide) reads from a long string (3 million characters)?

Using a StringBuilder to assemble the string will get you a 600 times increase in processing (as it avoids repeated object creation everytime you append to the string.

I think better solutions will come, but . NET StringBuilder class instances are faster than String class instances because it handles data as a Stream.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.