C＃泛型命名约定来自哪里？

Question

我知道T来自Type ，但为什么经常使用的下一个变量是K ？

Answer 1

I've seen K used for Key but not frequently as the "next" type parameter. For example, you'll see

Dictionary<K, V>

where K is for Key and V is for Value .

Sometimes you'll see T1 , T2 , etc. or T , U , V (the former is preferred here). But I prefer more descriptive names like

Map<TSource, TDestination>

or

Create<TUnitOfWork>

Answer 2

我的猜测是它来自Key 。

Answer 3

One more variation is the GenericFunction<T1,T2,TResult> , where TResult is the type of value returned by the functon. (as in, Func<T1,T2,...,TResult> )