You have a stray Pipe1
at the bottom of your Pipe2
if statement.
Update:
Try change declares to:
List<int> Pipe1 = new List<int>();
List<int> Pipe2 = new List<int>();
int PipeWidth = 55;
int PipeDifferentY = 140;
int PipeDifferentX = 180;
bool start = true;
and timer function to:
private void timer2_Tick(object sender, EventArgs e)
{
if (Pipe1[0] + PipeWidth <= 0 | start == true)
{
Random rnd = new Random();
int px = this.Width;
int py = rnd.Next(40, (this.Height - PipeDifferentY));
var p2x = px;
var p2y = py + PipeDifferentY;
Pipe1.Clear();
Pipe1.Add(px);
Pipe1.Add(py);
Pipe1.Add(p2x);
Pipe1.Add(p2y);
}
else
{
Pipe1[0] = Pipe1[0] - 2;
Pipe1[2] = Pipe1[2] - 2;
}
if (Pipe2[0] + PipeWidth <= 0)
{
Random rnd = new Random();
int px = this.Width;
int py = rnd.Next(40, (this.Height - PipeDifferentY));
var p2x = px;
var p2y = py + PipeDifferentY;
int[] p1 = { px, py, p2x, p2y };
Pipe2.Clear();
Pipe2.Add(px);
Pipe2.Add(py);
Pipe2.Add(p2x);
Pipe2.Add(p2y);
}
else
{
Pipe2[0] = Pipe2[0] - 2;
Pipe2[2] = Pipe2[2] - 2;
}
if (start == true)
{
start = false;
}
}
and your load form part:
Random rnd = new Random();
int py = rnd.Next(40, (this.Height - PipeDifferentY));
int py2 = py + PipeDifferentY;
Pipe1.Clear();
Pipe1.Add(this.Width);
Pipe1.Add(py);
Pipe1.Add(this.Width);
Pipe1.Add(p2y);
py = rnd.Next(40, (this.Height - PipeDifferentY));
py2 = py + PipeDifferentY;
Pipe2.Clear();
Pipe2.Add(this.Width + PipeDifferentX);
Pipe2.Add(py);
Pipe2.Add(this.Width + PipeDifferentX);
Pipe2.Add(p2y);
painting part should be ok