What operations are atomic in C#?

Question

Is there a systematic way to know whether an operation in C# will be atomic or not? Or are there any general guidelines or rules of thumb?

Accepted Answer

For something more complete/detailed:

Reads and writes to 32-bit value types are atomic: This includes the following intrinsic value (struct) types: `bool, char, byte, sbyte, short, ushort, int, uint, float`. The following types (amongst others) are not guaranteed to be atomic: `decimal, double, long, ulong`.

e.g.

```
int x;
x = 10; // atomic
decimal d;

d = 10m; // not atomic
```

Reference assignment is also an atomic operation:

```
private String _text;
public void Method(String text)
{
  _text = text; // atomic
}
```

What operations are atomic in C#?

Solution

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