System.ArgumentOutOfRangeException: startIndex cannot be larger than length of string

Question

I have this code. I am trying to retrieve just the text \"first program\". Considering that i know the index say 25 and total length of string is 35.

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Answer 1

The second parameter to Substring is how long you want the substring to be, not the end point of the substring. 25 + 35 is outside the range of the original string, so it throws an exception.