我似乎无法找到实际的*.dll文件.有很多对它们的引用,但似乎都没有文件路径.
有什么区别
public struct X{
public:
int A;};
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和
public value struct X{
public:
int A;};
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我如何将一个转换为另一个?
我有这样的通用接口:
public interface IHardwareProperty<T>{
bool Read();
bool Write();
}
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哪个是"通过"抽象基类:
public abstract class HardwareProperty<T>:IHardwareProperty<T>{
//Paritally implements IHardwareProperty (NOT SHOWN), and passes Read and Write through
//as abstract members.
public abstract bool Read();
public abstract bool Write();
}
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并在几个使用不同泛型参数的继承类中完成
CompletePropertyA:IHardwareProperty<int>
{
//Implements Read() & Write() here
}
CompletePropertyBL:IHardwareProperty<bool>
{
//Implements Read() & Write() here
}
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我想在同一个集合中存储一堆不同类型的已完成属性.有没有办法在不诉诸objects 的集合的情况下做到这一点?
我希望Enumerable.Empty<string>()返回一个空数组的字符串.相反,它似乎返回一个具有单个null值的数组.这打破了其他LINQ运算符DefaultIfEmpty,因为可枚举实际上不是空的.这似乎没有记录在任何地方,所以我想知道我是否遗漏了某些东西(概率为99%).
GameObject类
public GameObject(string id,IEnumerable<string> keywords) {
if (String.IsNullOrWhiteSpace(id)) {
throw new ArgumentException("invalid", "id");
}
if (keywords==null) {
throw new ArgumentException("invalid", "keywords");
}
if (keywords.DefaultIfEmpty() == null) { //This line doesn't work correctly.
throw new ArgumentException("invalid", "keywords");
}
if (keywords.Any(kw => String.IsNullOrWhiteSpace(kw))) {
throw new ArgumentException("invalid", "keywords");
}
_id = id;
_keywords = new HashSet<string>(keywords);
}
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测试
[TestMethod]
[ExpectedException(typeof(ArgumentException))]
public void EmptyKeywords() {
GameObject test = new GameObject("test",System.Linq.Enumerable.Empty<string>());
}
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