DistanceCheck https://stackoverflow.com/q/45078206/4369295

DistanceCheck.cs

public bool failsHoleConditions(HoleInfo holeOne, HoleInfo holeTwo)
{
    var radiusSum = (holeOne.Diameter + holeTwo.Diameter) /2;
    var distanceX = Math.Abs(holeOne.X - holeTwo.X);
    var distanceY = Math.Abs(holeOne.Y - holeTwo.Y);
    var distanceHolesSquare = (distanceX * distanceX) + (distanceY * distanceY) - (radiusSum * radiusSum); 


    if (distanceHolesSquare  <= 0)
    {
        //Overlaping
        return true;
    }
    else if (distanceHolesSquare <= minimumSpaceSquare)
    {
        //Distance too small
        holeMinSpaceFailed = true;
        return true;
    }
    return false;
}

internal struct HoleInfo
{
        public int Diameter { get; internal set; }
        public float X { get; internal set; }
        public float Y { get; internal set; }
}