I'm creating some logging code, and each one of my classes has an
internal static readonly instance of the logger which various methods
use, e.g.:

interface ILogger
{
 void LogDebug(...);
 void LogInfo(...);
 void LogError(...);
 ...
}

What I did was to create two classes, one in the case where the Logger
for that class is off, and the other when it is on.

class Logger : ILogger {...}

class NullLogger : ILogger {
        [Conditional("DEBUG")]
        public void LogDebug(...)
        {
        }
...
}

Now, my question is, the ILogger instance is assigned at runtime. So,
if I assign the NullLogger at runtime, which has [Conditional("DEBUG")]
will it still for sure not evaluate the parameters passed to the Log
method if it is of type NullLogger?

For example, with Conditional("DEBUG"), the executeLongMethodToGetValue
is not executed.

myLog.LogDebug(myObj.executeLongMethodToGetValue())

In this case, myLog is an interface assigned at runtime. If it is of
type NullLogger, will this still not evaluate
executeLongMethodToGetValue?

Thanks!