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.NET Forum / .NET Framework / New Users / January 2006Optional Parameters
So you have optional parameters for functions/methods in Visual Basic .NET, but not in C#? correct - optional parameters are not part of the C# language specification, however the same effect can be achieved by Method overloading for most cases. > So you have optional parameters for functions/methods in Visual Basic > ..NET, but not in C#? > correct - optional parameters are not part of the C# language specification, > however the same effect can be achieved by Method overloading for most cases. > > > So you have optional parameters for functions/methods in Visual Basic > > ..NET, but not in C#? Mark is right. Optional parameters are a Visual Basic *shortcut* to method overloading. That's why I tend to avoid them. Plus, in my eyes, they just look clunky and are harder to maintain. Note that you can create methods with optional parameters in C# using OptionalAttribute, you just can't consume them from C# (though you can from VB) and I don't think there's any way of specifying the default value for the optional argument which is a major limitation anyway - you will just get the default value for the type I think. > So you have optional parameters for functions/methods in Visual Basic > .NET, but not in C#? > Note that you can create methods with optional parameters in C# using > OptionalAttribute, you just can't consume them from C# (though you can > from VB) and I don't think there's any way of specifying the default value > for the optional argument which is a major limitation anyway - you will > just get the default value for the type I think. FYI There is a well known problem with optional parameters and versioning which essentially boils down to the same thing as the difference between public const int x = 3 and public static readonly int x = 3 One is compile time and one is runtime. This can cause a lot of confusion if you send out supposedly compatible dll fix with different optional parameters. you can use variable number of parameters in C#, I guess with the params[] keyword.... or object[].... > So you have optional parameters for functions/methods in Visual Basic > .NET, but not in C#? Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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