Search code examples
c#closures

What are 'closures' in C#?

Duplicate

Closures in .NET

What are closures in C#?

Solution

  • A closure in C# takes the form of an in-line delegate/anonymous method. A closure is attached to its parent method meaning that variables defined in parent's method body can be referenced from within the anonymous method.

    Example:

    public Person FindById(int id)
{
    return this.Find(delegate(Person p)
    {
        return (p.Id == id);
    });
}

    You could also take a look at Martin Fowler or Jon Skeet blogs. I am sure you will be able to get a more "In Depth" breakdown from at least one of them....

    Example for C# 6:

    public Person FindById(int id)
{
    return this.Find(p => p.Id == id);
}

    which is equivalent to

    public Person FindById(int id) => this.Find(p => p.Id == id);