It is highly recommended that the namespace name be specified by the assembly , and that it should be a unique namespace per assembly , or per application 强烈建议由该程序集指定命名空间名称,并且每个程序集或应用程序应该具有一个唯一的命名空间。
There is no strict limit to the levels of nesting you can declare , but keep in mind that when other code accesses the elements declared in the innermost namespace , it must use a qualification string containing all the namespace names in the nesting hierarchy 对于可以声明的嵌套级别并无严格的限制,但请记住,当其他代码访问在最内部的命名空间中声明的元素时,它必须使用一个包含嵌套层次结构中的所有命名空间名称的限定字符串。