Faster version of SetPixel

Question

Im not even sure this question is in the right category.

 

I really need a faster version of this function, and Im too nooby to transfer the online examples into my code:

void LayerShow (Color[,] layer) // Shows a layer in the panel.
{
for (int y = 0; y < CanvasDimY; y++)
{
for (int x = 0; x < CanvasDimX; x++)
{
image.SetPixel(x, y, layer[x, y]);
}
}
PanelCanvas.BackgroundImage = image;
PanelCanvas.Refresh();
}