C# Port for Particle system example

[Optimistic]

I have taken the code from https://www.sfml-dev.org/tutorials/2.4/graphics-vertex-array.php at the bottom of the page and translated it into its C# equivalent, but I can't seem to find the error; it doesn't output anything to the screen, and it is just black (The screen clear is black). https://pastebin.com/pF40bKaA is where I have pasted my code. 
I am sorry for any stupid mistakes I made in the "translation" as though I know basically nothing about C++ in specific. Thanks!

[eXpl0it3r]

How fast does your particle alpha value reach 0?

[Optimistic]

Not sure, will have to test later in the day. Thanks.

[Optimistic]

Ok, just tested, and found out that the alpha value goes from 255 to 0 in the first frame. Might it be because of the statement on line 97 because of ratio being to small?

[Optimistic]

I rewrote the update function to be more readable, here is the new code:

public void Update(Time Elapsed, Random R)
        {
            uint count = 0;
            foreach(var b in m_particles)
            {
                var temp = m_vertices[count];
                b.lifetime -= Elapsed;
                if (b.lifetime <= Time.FromSeconds(0))
                {
                    float Angle = ((R.Next() % 360) * 3.14159f) / 180;
                    float Speed = ((R.Next() % 50) + 50);
                    b.velocity = new Vector2f((float)Math.Cos(Angle) * Speed, (float)Math.Sin(Angle) * Speed);
                    b.lifetime = Time.FromMilliseconds((R.Next() % 2000) + 1000);
                    temp.Color = Color.White;
                    temp.Position = m_emitter;
                }
                temp.Position += b.velocity * Elapsed.AsSeconds();
                float ratio = b.lifetime.AsSeconds() / m_lifetime.AsSeconds();
                temp.Color.A =255;
                m_vertices[count] = temp;
            }
        }

[Optimistic]

Any Ideas? Anyone? 

[eXpl0it3r]

Any ideas on what? You already found the issue, is it really too much asked of you to find out how the logic of your code works?

If you don't understand it, then sit down with a pen and paper and play through your code manually.

Alternatively you can just start the debugger and step through the code.

[Optimistic]

Oh goodness how stupid I am....
I use an unused variable named count, and not the iterator index...
Wow...

[Optimistic]

A Cleaned up and working version is available at https://pastebin.com/3bXMX8in