using System;
public class Program
{
public static void Main()
int textBox1 =300;
int textBox2 = 0;
int loopIncrement = 100;
int textBox2Increment = 0;
for(int i = 0; i <= textBox1; i+=loopIncrement)
textBox2 += textBox2Increment;
textBox2Increment = 2;
}
Console.WriteLine(string.Concat("Amount is:" + textBox2));