Question

I tend to create a synchronized method by using

[MethodImpl(MethodImplOptions.Synchronized)]

However, I realize MethodImplOptions.Synchronized is not found in Metro.

Hence, what is the equivalent replacement?

Answer 1

Hence, what is the equivalent replacement?

MethodImplOptions.Synchronized is just an equivalent for these constructs:

lock(this)
{
    InstanceFoo(); // instance method
}

lock(typeof(MyType))
{
    StaticFoo(); // static method
}

you can use regular lock, but I strongly recommend to not lock on this and typeof().