.method private hidebysig specialname rtspecialname static 
          void  .cctor() cil managed
  {
    // Code size       11 (0xb)
    .maxstack  8
    .line 25,25 : 9,42 ''
    IL_0000:  ldc.i4     0x3039
    IL_0005:  stsfld     int32 TestIL.TestClass1::m_int
    .line 16707566,16707566 : 0,0 ''
    IL_000a:  ret
  } // end of method TestClass1::.cctor

My question is, how can one get this method via reflection at runtime?

6 minutes ago,Dexter wrote

You can use Type.GetConstructors(BindingFlags.Static | BindingFlags.NonPublic) and select the one where IsStatic is true.

Ah excellent! I thought I tried that already, but I just tried it again and got it working.

Let's say I'm writing a compiler that takes IL and compiles it to some native code. At runtime, would it be enough to call all static contructors of all classes to ensure that static fields are properly initialized (does order matter?), or is there something else that needs to be executed as well (in addition to the assembly's EntryPoint)?

So basically:

1. Call all static constructors
2. Call Assembly.EntryPoint

The basic requirement is that the static constructor (aka type initialized) of a type is called before any of the static fields of that type are accessed. This lazy initialization generates a particular ordering that you cannot reproduce at statup without some complicated or even impossible code analysis.

You can read more details about this in section 10.5.3 of the ECMA-335 standard (http://www.ecma-international.org/publications/standards/Ecma-335.htm).

In my case the number of static fields will be minimal so I don't think it should be a problem to just call them all.

Although, this lazy initialization... How would that work in cases like this:

private static DateTime initTime =  DateTime.Now;

...or cases where the static field is something that does real work, like a class that creates a file in its constructor, etc? Some other class instance might need to use that file. A bit of a contrived example, but still...

OK thanks, that makes sense. Basically it is a non-issue.