Why can't I initialize my fields in my structs?

Question

I am surprised that I can't initialize my fields in structs, why is it like that? Like:

struct MyStruct
{
    private int a = 90;
}

but it's a complie time error. I don't know why it's a problem? Please explain this to me.

Answer 1

In C#, a struct cannot declare a default constructor.

The compiler moves the initialization statements to the constructor, which can't happen with a struct in C#.