小编use*_*286的帖子

我用谷歌搜索,但找不到满意的答案.我基本上试图让这段代码工作:

public List<WordEntry> WordDataBase = new List<WordEntry>();
public List<CharacterEntry> CharacterDataBase = new List<CharacterEntry>();

public List<Entry> SelectWhere<T>(System.Func<T, bool> predicate) where T : Entry
{
    if (typeof(T) == typeof(WordEntry))
        return WordDataBase.Where(predicate);
    else if (typeof(T) == typeof(CharacterEntry))
        return CharacterDataBase.Where(predicate);
    else
        return null;
} 

在此示例中,WordEntry和CharacterEntry都是从Entry派生的.我得到编译器错误:

Error   CS1503  Argument 2: cannot convert from 'System.Func<T, bool>' to 'System.Func<WordEntry, int, bool>'   

和

Error   CS1503  Argument 2: cannot convert from 'System.Func<T, bool>' to 'System.Func<CharacterEntry, int, bool>'

希望你能帮助我.提前致谢