这个属性初始化的C＃模式是什么？

Question

I'll often have objects with properties that use the following pattern:

private decimal? _blah;
private decimal Blah
{
    get
    {
        if (_blah == null)
            _blah = InitBlah();
        return _blah.Value;
    }
}

Is there a name for this method?

Answer 1

Lazy initialisation.

.NET 4, when it arrives, will have a Lazy<T> class built-in.

private readonly Lazy<decimal> _blah = new Lazy<decimal>(() => InitBlah());
public decimal Blah
{
    get { return _blah.Value; }
}

Answer 2

Lazy loading, deferred initialization, etc.

Noet that InitBlah should (in this case) ideally return decimal , not decimal? to avoid the chance that it gets called lots of times because it is legitimately null.

Answer 3

延迟初始化 。

Answer 4

这称为延迟初始化

Answer 5

懒惰的初始化程序