Question

我是C#的初学者，现在正在学习泛型，是拿.ner framework的类库中的List<T>类的源代码做例子，下面是源代码

有几行看不懂，望高手指教，

[DebuggerTypeProxy(typeof(Mscorlib_CollectionDebugView<>))]
[DebuggerDisplay("Count = {Count}")]
[Serializable]

public class List<T> : IList<T>, System.Collections.IList
{
private const int _defaultCapacity = 4;//默认容量
private T[] _items;
[ContractPublicPropertyName("Count")]
private int _size;
private int _version;
[NonSerialized]
private Object _syncRoot;
static readonly T[] _emptyArray = new T[0];

// Constructs a List. The list is initially empty and has a capacity
// of zero. Upon adding the first element to the list the capacity is
// increased to 16, and then increased in multiples of two as required.

#if !FEATURE_CORECLR
[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
#endif
public List() {
_items = _emptyArray;
}

// Constructs a List with a given initial capacity. The list is
// initially empty, but will have room for the given number of elements
// before any reallocations are required.
#if !FEATURE_CORECLR
[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]
#endif
public List(int capacity) {
if (capacity < 0) ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.capacity, ExceptionResource.ArgumentOutOfRange_NeedNonNegNum);
Contract.EndContractBlock();
_items = new T[capacity];
}
====================================
以下几行代码看不懂，望高手指点这几行是分别什么意思
[DebuggerTypeProxy(typeof(Mscorlib_CollectionDebugView<>))]
[DebuggerDisplay("Count = {Count}")]
[Serializable]

#if !FEATURE_CORECLR
[TargetedPatchingOptOut("Performance critical to inline across NGen image boundaries")]

Answer 1

中括号括起来的据我所知有两个作用，一个是下标，也就是索引，另一个作用就是特性了
比如[Serializable]表示此类可以序列化和反序列化，至于序列化的意思也就是比如你在数据库读取了很多数据，想将这些数据存到XML中或者文本文件中，这个过程就是序列化。相反，你将XML中或文本文件中的数据读取出来，这个过程就是反序列化。
至于其他的我也不是很明白。。。你查查单词的意思应该就能猜出个大概了！

Answer 2

楼主，看你这样爱学，我还是把我培训的视频教程共享给你把， 泛型<T> 中的T是类型，dictionary<string,string> 字典 key value

百度搜索 “黑马.net全套视频” 我已经上传到网盘了