why foreach is faster than for loop while reading richtextbox lines

Question

There are two ways to read data from RichTextBox line by line

1 ) use a for loop to loop through lines of a richtextBox

String s=String.Empty;
for(in         


        

Answer 1

Could it be that each line is being copied to a new string variable (str) on each loop? I'm guissing here, but you could probably verify the theory with this code

String s = String.Empty;
for (int i = 0; i < richTextBox.Lines.Length; i++)
{
    string str = richTextBox.Lines[i];
    s = str;
}