How do i return a value from LINQ into a parameter? C#

So there's this method:

public void Method(A a, B b)
{
     OtherMethod(a, a.list.ForEach(o => {if(o.Status == Good){ return o};), b)
}

OtherMethod() needs 3 params. I want that o to put in the parameters, but I don't know how. Anybody knows how?

The actual code:

public void AddProduct(UserDTO u, ProductDTO p)
{
    if(CheckForCurrentOrder(u) != 0) //returns ID of order with status = "NotPaid"
    {
        CreateEmptyOrder(u);
        SetProductInOrder(u, u.Orders.ForEach(o => { if (o.Status == EnumsDTO.OrderStatus.NotPaid) { return o}; }), p);
    }

//rest of database code thats not relevant..
}