Question

I have a string and I want to replace a part of it.
The tricky part is that that I can’t use Regex.replace, because I only know the start and end positions of the data in the string.
For example, if the string looks like this:

I love cats, some more stuff here, we dont know how much more

And I have start=8 and end=11. And I want to replace that part to whatever I need to. This time lets say dogs so the new string will look like:

I love dogs, some more stuff here, we dont know how much more

How I could do that?

Answer 1

Simplest way:

string replaced = original.Substring(0, start) + replacementText + 
                  original.Substring(end);

I had expected StringBuilder to have something which would do this, but I think you’d have to call Remove then Insert.