Are static variables thread-safe? C#

Question

I want to create a class which stores DataTables, this will prevent my application to import a list of details each time I want to retrieve it. Therefore this should be done

Answer 1

I thought it would be worth adding that Double Check Locking has since been implemented in .net framework 4.0 in a class named Lazy. So if you would like your class to include the locking by default then you can use it like this:

public class MySingleton
{
    private static readonly Lazy _mySingleton = new Lazy(() => new MySingleton());

    private MySingleton() { }

    public static MySingleton Instance
    {
        get
        {
            return _mySingleton.Value;
        }
    }
}