RBMHiddenLayer.cs

public class HiddenLayer : Layer
{
    public HiddenLayer(int numberOfNeurons) : base(numberOfNeurons)
    { }

    public void CalculateState()
    {
        foreach(var neuron in Neurons)
        {
            var probability = _sigmoid.CalculateOutput(neuron.Inputs.Where(x => x.InputNeruon.State).Sum(y => y.Weight));
            neuron.State = probability < _random.NextDouble();
        }
    }

    public override void CalculateCDState()
    {
        foreach (var neuron in Neurons)
        {
            var probability = _sigmoid.CalculateOutput(neuron.Inputs.Where(x => x.InputNeruon.CDState).Sum(y => y.Weight));
            neuron.CDState = probability < _random.NextDouble();
        }
    }
}