c# - 是否可以将 Func<T> 存储在字典中？

Question

我希望能够实现一个键为 Type 的字典值 Func<T>其中 T是与键相同类型的对象:

Dictionary<Type, Func<T>> TypeDictionary = new Dictionary<Type, Func<T>>( ) /*Func<T> returns an object of the same type as the Key*/

TypeDictionary.Add( typeof( int ), ( ) => 5 );
TypeDictionary.Add( typeof( string ), ( ) => "Foo" );

因此，基本上，字典将填充引用 Func<T> 的类型。这将返回该值:

int Bar = TypeDictionary[ typeof( int ) ]( );
string Baz = TypeDictionary[ typeof( string ) ]( );

我该如何着手实现和强制执行？

Answer 1

这与您将要获得的结果差不多:

void Main()
{
    var myDict = new MyWrappedDictionary();
    myDict.Add(() => "Rob");
    var func = myDict.Get<string>();
    Console.WriteLine(func());
}

public class MyWrappedDictionary
{
    private Dictionary<Type, object> innerDictionary = new Dictionary<Type, object>();
    public void Add<T>(Func<T> func)
    {
        innerDictionary.Add(typeof(T), func);
    }
    public Func<T> Get<T>()
    {
        return innerDictionary[typeof(T)] as Func<T>;
    }
}