C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?

Question

Both of these generate an error saying they must be a compile-time constant:

void Foo(TimeSpan span = TimeSpan.FromSeconds(2.0))
void Foo(TimeSpan span = new         


        

Answer 1

My suggestion:

void A( long spanInMs = 2000 )
{
    var ts = TimeSpan.FromMilliseconds(spanInMs);

    //...
}

BTW TimeSpan.FromSeconds(2.0) does not equal new TimeSpan(2000) - the constructor takes ticks.