Are C# structs thread safe?

Question

Is a C# struct thread-safe?

For example if there is a:

struct Data
{
    int _number;
    public int Number { get { return _number; } set { _number =         


        

Answer 1

No, they are not. I created very simple app to see if 10/10 producer/consumer threads are accessing same struct variable. And eventually you will see Debugger.Break(); will be hit. Bank balance should never go under 0 value.

namespace StructThreadSafe
{
    class Program
    {
        struct BankBalance
        {
            public decimal Balance { get; set; }
        }

        static void Main(string[] args)
        {
            BankBalance bankBalance = new BankBalance();
            bankBalance.Balance = 100;
            List allTasks = new List();
            for (int q = 0; q < 10; q++)
            {
                Task producer = new Task(() =>
                {
                    for (int i = 0; i < 1000; i++)
                    {
                        if (bankBalance.Balance < 0)
                        {
                            if (Debugger.IsAttached)
                            {
                                Debugger.Break();
                            }   
                        }
                        bankBalance.Balance += 5;
                        Console.WriteLine("++Current Balance: " + bankBalance.Balance);
                        System.Threading.Thread.Sleep(100);
                    }
                });
                allTasks.Add(producer);
            }
            for (int w = 0; w < 10; w++)
            {
                Task consumer = new Task(() =>
                {
                    for (int i = 0; i < 1000; i++)
                    {
                        if (bankBalance.Balance < 0)
                        {
                            if (Debugger.IsAttached)
                            {
                                Debugger.Break();
                            }
                        }
                        if (bankBalance.Balance > 15)
                        {
                            bankBalance.Balance -= 15;
                            Console.WriteLine("--Current Balance: " + bankBalance.Balance);
                        }
                        else
                        {
                            Console.WriteLine("**Current Balance below minimum: " + bankBalance.Balance);
                        }
                        System.Threading.Thread.Sleep(100);
                    }
                });
                allTasks.Add(consumer);
            }
            allTasks.ForEach(p => p.Start());
            Task.WaitAll(allTasks.ToArray());

        }
    }
}