内容简介：翻译自：https://stackoverflow.com/questions/4268452/differences-between-user-created-structs-and-framework-structs-in-net
为什么C#编译器不允许你编译它：
int a; Console.WriteLine(a);
但是允许你编译：
MyStruct a; Console.WriteLine(a);
其中MyStruct定义为：
struct MyStruct
{
}
更新：在第一个案例中错误是：
Error 1 Use of unassigned local variable ‘a’
摘录：
5.3 Definite assignment
…
A struct-type variable is considered
if each of its
instance variables is considered
definitely assigned.
显然,由于你的结构没有字段,这不是问题;它被认为是明确分配的.向其添加字段应该会破坏构建.
在一个有点相关的说明：
11.3.8 Constructors No instance member function can be called until all fields of the struct being constructed have been definitely assigned.
翻译自：https://stackoverflow.com/questions/4268452/differences-between-user-created-structs-and-framework-structs-in-net
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