摘要：I often hear the question, “Should I design a base type or an interface?” The answer isn’talways clear-cut. Here are some guidelines that might help you:n IS-A vs. CAN-DO relationship A type can inherit only one implementation. If thederived type can’t claim an IS-A relationship with the base type, 阅读全文

摘要：fixed 语句设置指向托管变量的指针并在 statement 执行期间“钉住”该变量。如果没有 fixed 语句，则指向可移动托管变量的指针的作用很小，因为垃圾回收可能不可预知地重定位变量。C# 编译器只允许在 fixed 语句中分配指向托管变量的指针。[代码]可以用数组或字符串的地址初始化指针：[代码]要初始化不同类型的指针，只需嵌套 fixed 语句：[代码] 阅读全文