How to take random line from textBox MultiLine?

Question

C++ / C#

string st1 = textBox2.Text;
Random rnd = new Random();
string random_string = Вот тут надо взять рандомную строчку из st1;

Answer 1

Strings are a set of characters separated by newlines. Therefore:
1. Distill st1 into a string array via Split. Separator - line break;
2. Use Ubound to define the upper bound of the resulting array. (The lower bound is zero);
3. When calling Random, define the lower and upper limits of the range from which the lines will be taken;
4. Call Random, get a random number from the given range.
5. Take the element with this number from the string array. Profit!)