C# loop over bool values

Question

Is there a concise way to loop over true/false in C#?

I have ~20 lines of code in a unit test I'd rather not duplicate to toggle one boolean true/false.

I could break it off into a function and call it twice, but meh. This code feels more like I'm iterating over possible values than performing a distinct action with different parameters. Even if I had a function, I'd prefer the syntax of looping over the possible values rather than just calling it twice.

I could write a for loop like so...

bool toggle;
for (int i = 0; i < 2; i++)
{
    toggle = i == 1;
}

But that doesn't seem very clean.

I like this syntax:

for (bool b : { false, true }) { /* ... */ }

But it doesn't look like that will compile in C#.

Edit:

Following Jeroen's suggestion about local functions and Dmitry's answer, this is the route I went:

[TestMethod]
public void GetAndSetValue()
{
    foreach (bool toggle in new [] { false, true })
    {
        GetAndSetValue(toggle);
    }

    void GetAndSetValue(bool toggle)
    {
        // details not important
    }
}

Reasonable coders can debate whether the loop reads more easily than two function calls:

GetAndSetValue(false);
GetAndSetValue(true);

I like the loop better, so I'll roll with it until someone complains. Cheers!

Answer 1

Correct syntax will be foreach, not for:

foreach (bool b in new [] { false, true }) {
   /* ... */
}

Answer 2

While I think simply writing a parametrized function is definitely the correct approach, the closest to that C++11 syntax that you can get in C# would be:

foreach (bool value in new [] { false, true })
{
    // ...
}

Answer 3

I would probably just do it this way, either with a local function:

[TestMethod]
public void GetAndSetValue()
{
    GetAndSetValue(false);

    void GetAndSetValue(bool toggle)
    {
        // details not important

        if (!toggle)
            GetAndSetValue(true);
    }
}

Or "old" school with a private method.

[TestMethod]
public void GetAndSetValue()
{
    GetAndSetValue(false);
}

private void GetAndSetValue(bool toggle)
{
    // details not important

    if (!toggle)
        GetAndSetValue(true);
}