Single single=new Single();为什么这样错了

Single single=new Single();为什么这样错了 single single single Play Single Play Single Still single Still single C#中dictionary.single()是什么意思?补充single定义Dictionary usedIconList = new Dictionary(); SrcMajIconId_t srcMajIconId = usedIconList.Single(x => x.Value == iconId).Key; return allIconSets[srcMajIconId];当中usediconlist for single colorful single still single ENJOY SINGLE every single single歌词 single-digit single ladies Single-spaced Single's sail single