Question

Why does it not generate an error?
If i try change private field of this struct in main program file – it generates an error, but not in struct implementation.

public struct MyStruct
{
    private int privateField;

    public int MyField
    {
        get { return privateField; }
        set { if (value >= 0) privateField = value; else value = 0 }
    }

    public void SomeMethod (MyStyruct s)
    {
        s.privateField = 10; // no error here.  
    }
}

Answer 1

Private members are restricted to the class or struct not the object. In this case, even though s is a different object from this, it still works.