Simple Neural Network routine

Feed Forward basic routine

public double[] FeedForward(double[] inputs)
{
    for (int i = 0; i < inputs.Length; i++)
    {
        neurons[0][i] = inputs[i];
    }

    for (int i = 1; i < layers.Length; i++)
    {
        for (int j = 0; j < neurons[i].Length; j++)
        {
            double value = 0f;
            for (int k = 0; k < neurons[i - 1].Length; k++)
            {
                value += weights[i - 1][j][k] * neurons[i - 1][k];
            }

            neurons[i][j] = activate(i, value + biases[i][j]);
        }
    }

    return neurons[neurons.Length - 1];
}