```
public int Distance2D(int x1, int y1, int x2, int y2)
{
// ______________________
//d = √ (x2-x1)^2 + (y2-y1)^2
//
//Our end result
int result = 0;
//Take x2-x1, then square it
double part1 = Math.Pow((x2 - x1), 2);
//Take y2-y1, then sqaure it
double part2 = Math.Pow((y2 - y1), 2);
//Add both of the parts together
double underRadical = part1 + part2;
//Get the square root of the parts
result = (int)Math.Sqrt(underRadical);
//Return our result
return result;
}
```

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