For value types , nullable types will be generated.

参数。对于值类型，将生成可为空的类型。

Structs are value types and classes are reference types.

结构是值类型,而类是引用类型.

In general, value types are cheaper to allocate and deallocate;

通常情况下，值类型的内存空间分配和释放的开销较小；

Value types are copied when clients access them through a property.

客户通过属性访问值类型时,值是被复制的.

Practice 2 Create a custom class that can be converted to common value types.

练习2建立一个自定义类,它能够被转换为普通的值类型.

That simple code snippet starts to show you the distinction: Value types store values, and reference types define behavior.

这段简单的代码开始告诉你它们的区别：值类型存储数据，引用类型表现行为。

Because structures are value types , each structure variable is permanently bound to an individual structure instance.

由于结构是值类型，每个结构变量都永久地绑定到一个单独的结构实例。

Because structures are value types, each structure variable is permanently bound to an individual structure instance.

由于结构是值类型, 每个结构变量都永久地绑定到一个单独的结构实例.