Passing an empty array as default value of an optional parameter [duplicate]

by

You can’t create compile-time constants of object references.

The only valid compile-time constant you can use is null, so change your code to this:

public void DoSomething(int index, ushort[] array = null,
  bool thirdParam = true)

And inside your method do this:

array = array ?? new ushort[0];

(from comments) From C# 8 onwards you can also use the shorter syntax:

array ??= new ushort[0];

More Related Contents:

  1. C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?
  2. Setting the default value of a C# Optional Parameter
  3. How can you use optional parameters in C#?
  4. How to populate/instantiate a C# array with a single value?
  5. C# 4.0, optional parameters and params do not work together
  6. C# optional parameters on overridden methods
  7. Why are C# 4 optional parameters defined on interface not enforced on implementing class?
  8. How do I handle null or optional DLL struct parameters
  9. Should you declare methods using overloads or optional parameters in C# 4.0?
  10. What is the default value of a member in an array?
  11. method overloading vs optional parameter in C# 4.0 [duplicate]
  12. Invoking methods with optional parameters through reflection
  13. Can I have an optional parameter for an ASP.NET SOAP web service
  14. Parameter Action in which T3 can be optional
  15. Check inside method whether some optional argument was passed
  16. How to pass a nullable type to a P/invoked function [duplicate]
  17. Why is the default value of the string type null instead of an empty string?
  18. Returning a default value. (C#)
  19. Should these arguments be added or removed?
  20. Mocking Extension Methods with Moq
  21. OpenSubKey() returns null for a registry key that I can see in regedit.exe
  22. Convert string to DateTime in c#
  23. C# – Capturing the Mouse cursor image
  24. Console.WriteLine and generic List
  25. Total number of items defined in an enum
  26. Read HttpContent in WebApi controller
  27. How can I fix the error : “Unreachable Code Detected”
  28. Sending and receiving UDP packets between two programs on the same computer
  29. What is the “base class” for numeric value types?
  30. Why doesn’t C# use arithmetic overflow checking by default? [duplicate]

Leave a Comment