Using collection initializer inside object initializer
suggest changepublic class Tag
{
public IList<string> Synonyms { get; set; }
}
Synonyms
is a collection-type property. When the Tag
object is created using object initializer syntax, Synonyms
can also be initialized with collection initializer syntax:
Tag t = new Tag
{
Synonyms = new List<string> {"c#", "c-sharp"}
};
The collection property can be readonly and still support collection initializer syntax. Consider this modified example (Synonyms
property now has a private setter):
public class Tag
{
public Tag()
{
Synonyms = new List<string>();
}
public IList<string> Synonyms { get; private set; }
}
A new Tag
object can be created like this:
Tag t = new Tag
{
Synonyms = {"c#", "c-sharp"}
};
This works because collection initializers are just syntatic sugar over calls to Add()
. There’s no new list being created here, the compiler is just generating calls to Add()
on the exiting object.
Found a mistake? Have a question or improvement idea?
Let me know.
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