public abstract class ABC {}
public class XYZ : ABC {}
public GenericList<T> where T : ABC
表示用于代替 T 的任何类型都必须是 ABC 类型或从 ABC 派生。
C++0x 的概念思想只是说用来代替 T 的类型必须具有与 ABC（或 IDisposable）定义的相同的属性，而不是它必须是该类型。
One thing to keep in mind is that C++ templates and C# generics are not exactly the same. See this answer for more details on those differences.
From the page you linked to explaining C++0x concepts, it sounds like the idea is that in C++ you want to be able to specify that the template type implements certain properties. In C#, the constraint goes further than that and forces the generic type to be "of" that constraint. For example, the following C# code:
public GenericList<T> where T : IDisposable
says that any type used in place of T must implement the IDisposable interface. Likewise, the following code:
public abstract class ABC {}
public class XYZ : ABC {}
public GenericList<T> where T : ABC
says that any type used in place of T must be of type ABC or derived from ABC.
The C++0x concept idea says only that the type used in place of T must have the same properties as defined by ABC (or IDisposable) not that it must be of that type.
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需要记住的一件事是 C++ 模板和 C# 泛型并不完全相同。 有关这些差异的更多详细信息，请参阅此答案。
从您链接到解释 C++0x 概念的页面来看，听起来这个想法是在 C++ 中您希望能够指定模板类型实现某些属性。 在 C# 中，约束比这更进一步，它强制泛型类型属于该约束。 例如，以下 C# 代码：
表示用于代替 T 的任何类型必须实现 IDisposable 接口。 同样，以下代码：
表示用于代替 T 的任何类型都必须是 ABC 类型或从 ABC 派生。
C++0x 的概念思想只是说用来代替 T 的类型必须具有与 ABC（或 IDisposable）定义的相同的属性，而不是它必须是该类型。
One thing to keep in mind is that C++ templates and C# generics are not exactly the same. See this answer for more details on those differences.
From the page you linked to explaining C++0x concepts, it sounds like the idea is that in C++ you want to be able to specify that the template type implements certain properties. In C#, the constraint goes further than that and forces the generic type to be "of" that constraint. For example, the following C# code:
says that any type used in place of T must implement the IDisposable interface. Likewise, the following code:
says that any type used in place of T must be of type ABC or derived from ABC.
The C++0x concept idea says only that the type used in place of T must have the same properties as defined by ABC (or IDisposable) not that it must be of that type.