C＃变量的初始化问题 [英] C# Variable Initialization Question

问题描述

有没有我是否喜欢初始化一个整数变量任何区别：

Is there any difference on whether I initialize an integer variable like:

int i = 0;
int i;

该编译器或CLR把这当作一回事？ IIRC，我觉得他们都被视为同样的事情，但我似乎无法找到的文章。

Does the compiler or CLR treat this as the same thing? IIRC, I think they're both treated as the same thing, but I can't seem to find the article.

推荐答案

我看着IL（使用ILDASM）和其真正的，只有INT设置为0，真是设置为0，在构造函数中。

I looked at the IL (using ildasm) and its true that only the int set to 0 is really set to 0 in the constructor.

public class Class1
{
    int setToZero = 0;
    int notSet;
}

生成：

Generates:

.method public hidebysig specialname rtspecialname 
        instance void  .ctor() cil managed
{
  // Code size       15 (0xf)
  .maxstack  8
  IL_0000:  ldarg.0
  IL_0001:  ldc.i4.0
  IL_0002:  stfld      int32 ClassLibrary1.Class1::setToZero
  IL_0007:  ldarg.0
  IL_0008:  call       instance void [mscorlib]System.Object::.ctor()
  IL_000d:  nop
  IL_000e:  ret
} // end of method Class1::.ctor

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