C#•2w ago

✅ Is there a difference when we use { get; init; } vs { get; } ?

C#
public record Person
{
    public required string FirstName { get; init; }
    public required string LastName { get; init; }
};

C#
public record Person
{
    public required string FirstName { get; init; }
    public required string LastName { get; init; }
};

Hello guys, if I omit the init keyword here, would it make a difference? From what I've understood with or without the init keyword, we would still be able to "modify" the object during instantiation, no?

13 Replies

reflectronic•2w ago

var p = new Person
{
     FirstName = "Hello",
     LastName = "World"
};

var p = new Person
{
     FirstName = "Hello",
     LastName = "World"
};

this code only works if they are init it does not work if they are only get

FakerOP•2w ago

oh ok, would it have work if we would have use the constructor instead of the object initializer?

reflectronic•2w ago

i don't understand what you mean

FakerOP•2w ago

I mean, without the init, we would only have been able to do this:

C#

var p = new Person("John","Doe");

C#

var p = new Person("John","Doe");

reflectronic•2w ago

well, you can't, since you didn't declare a constructor at all

FakerOP•2w ago

Ah I see, my bad sorry Assume the constructor is there

reflectronic•2w ago

then, yes, you would have to use it that's 'the old way', i suppose

Angius•2w ago

init basically lets you use a setter but only once, during initialization

FakerOP•2w ago

yep I see

Angius•2w ago

Functionally,

class Person(string name)
{
    public string Name { get; } = name;
}

var p = new Person("John");

class Person(string name)
{
    public string Name { get; } = name;
}

var p = new Person("John");

and

class Person
{
    public string Name { get; init; }
}

var p = new Person { Name = "John" };

class Person
{
    public string Name { get; init; }
}

var p = new Person { Name = "John" };

are about the same

FakerOP•2w ago

yeah, it's just syntax sugar?

Angius•2w ago

Lets you use initializer syntax with similar guarantees a constructor can give you Especially paired with a required keyword

FakerOP•2w ago

yep I see Thanks !

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✅ Is there a difference when we use { get; init; } vs { get; } ?

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