Thread safety on readonly static field initialisation

Question

If one creates a readonly static member like this:

public sealed class MyClass
{
    public readonly static MyClass Instance = new MyClass();
}

Answer 1

The class initialization is guaranteed by the specification of the C# language to be thread safe, so only one instance of MyClass will be created. You would have to ensure thread safety from that point onwards yourself. Here's an MSDN reference:

http://msdn.microsoft.com/en-us/library/aa645612.aspx