rollsch

public static void SwitchPattern(object o)
{
    switch (o)
    {
        case null:
            Console.WriteLine("it's a constant pattern");
            break;
        case int i:
            Console.WriteLine("it's an int");
            break;

rollsch

/// <summary>
/// Gets or the current customer if they are registered, if not registered it returns null
/// </summary>
[CanBeNull]
public virtual Customer CurrentRegisteredCustomer
{
	get
	{
		//whether there is a cached value
		if (_cachedCustomer != null)