Question

I have this method

public static void WriteErrorLog(LogEntry logEntry, string method, [Optional, DefaultParameterValue(0)]  int? errorTypeID)

So I expect that I can call the method like

WriteErrorLog(l, "text");

But I get an error of Visual Studio anyway 🙁

No overload for method ‘WriteErrorLog’ takes 2 arguments

What I am missing?

Thank you!

Answer 1

You’re not supposed to be using [Optional, DefaultParameterValue(0)]. Instead, you should use the c-style default parameter syntax:

public static void WriteErrorLog(LogEntry logEntry, string method, int? errorTypeID = 0)

Also, if errorTypeId is a Nullable, then shouldn’t you have the default value be null?

public static void WriteErrorLog(LogEntry logEntry, string method, int? errorTypeID = null)