static void Main(string[] args)
{
//#nullable disable
//string? message = null;
Message message = new Message
{
//Text = "Hello there!",
Text = null !,
From = null
};
//#nullable enable
//Console.WriteLine(message);
MessagePopulator.Populate(message);
Console.WriteLine(message.Text);
//Console.WriteLine(message.From ?? "no from");
Console.WriteLine(message.From);
Console.WriteLine(message.From !.Length); //null forgiving operator only affects compile time
Console.WriteLine(message.ToUpperFrom());
//string is a reference type
Console.WriteLine("Press enter to end");
Console.ReadLine(); //preventing the console app from exiting until pressing enter
}
}
static void Main(string[] args)
{
// #nullable disable
// string message = null;
// #nullable enable
// string? message = null;
Message message = new Message()
{
Text = "Hello there!",
// Text = null!,
From = null
};
MessagePopulator.Populate(message);
Console.WriteLine(message.Text);
Console.WriteLine(message.From ?? "From is not specified.");
Console.WriteLine(message.From !.Length);
Console.WriteLine(message.ToUpperFrom());
Console.WriteLine("Press enter to end!");
Console.ReadLine();
}
static void Main(string[] args)
{
Message message = new Message {
Text = "Hello there!",
From = null
};
MessagePopulator.Populate(message);
Console.WriteLine(message.Text);
Console.WriteLine(message.From);
Console.WriteLine(message.From !.Length); // null-forgiving operator
// only has effect on compiler. If we pass a null value, it will still throw exception at runtime
// use with great care and only when absolutely necessary. May be useful for tests
Console.WriteLine(message.ToUpperFrom());
Console.ReadLine();
}
static void Main(string[] args)
{
Message message = new Message
{
Text = null !,
From = null
};
MessagePopulator.Populate(message);
Console.WriteLine(message.Text);
Console.WriteLine(message.From);
Console.WriteLine(message.From !.Length);
Console.WriteLine(message.ToUpperFrom());
Console.WriteLine("Press enter to end");
Console.ReadLine();
}
}
