Code Snippet

static void Work(Customer[] customers)
{
    if (customers != null)
    {
        Customer c = customers[0];

        if (c != null && c.Orders != null)
        {
            int res = c.Orders.Length;
        }
    }
}

Code Snippet

static void OnMyEvent()
{
    if (MyEvent != null)
    {
        MyEvent(this, EventArgs.Empty);
    }
}

Code Snippet

int? res = GetValue();

int data = res ?? 10;

Code Snippet

static void Work(Customer[] customers)
{
    int? length = customers?.Length;
    Customer first = customers?[0]; 
    int? count = customers?[0]?.Orders?.Count(); 
}

Code Snippet

static void OnMyEvent()
{
    MyEvent?.Invoke(this, EventArgs.Empty);
}

Code Snippet

private static void Work(Customer[] customers)
{
    int? nullable;
    int? nullable1;
    Customer customer;
    int? nullable2;
    if (customers != null)
    {
        nullable1 = new int?((int)customers.Length);
    }
    else
    {
        nullable = null;
        nullable1 = nullable;
    }
    if (customers != null)
    {
        customer = customers[0];
    }
    else
    {
        customer = null;
    }
    if (customers != null)
    {
        Customer customer1 = customers[0];
        if (customer1 != null)
        {
            int[] orders = customer1.Orders;
            if (orders != null)
            {
                nullable2 = new int?(((IEnumerable<int>)orders).Count<int>());
            }
            else
            {
                nullable = null;
                nullable2 = nullable;
            }
        }
        else
        {
            nullable = null;
            nullable2 = nullable;
        }
    }
    else
    {
        nullable = null;
        nullable2 = nullable;
    }
}