Differences Between Enums in C# and VB.NET?

A method call is not a constant expression. Try this.

A method call is not a constant expression. Try this: public enum Status { Open = 'O', Closed = 'C', Pending = 'P', EnRoute = 'E' } The reason AscW works in VB is that it's an internal thing that VB compiler understands and evaluates at compile time and is considered a constant expression by the compiler. Even in VB, Convert.

ToInt32 will not work. To quote the Visual Basic specification: 11.2 Constant Expressions A constant expression is an expression whose value can be fully evaluated at compile time. ... The following constructs are permitted in constant expressions: ... The following run-time functions: Microsoft.VisualBasic.Strings.

ChrW Microsoft.VisualBasic.Strings. Chr, if the constant value is between 0 and 128 Microsoft.VisualBasic.Strings. AscW, if the constant string is not empty Microsoft.VisualBasic.Strings.

Asc, if the constant string is not empty.

Well I guess it could not be much easier than this :) Thank you! – Josh Stodola Jan 14 '10 at 16:10 +1 and accepted, especially because you included why my sample code works in VB. Thank you, Mehrdad.

– Josh Stodola Jan 14 '10 at 16:11 3 Nick: It doesn't really matter that it's declared in Microsoft.VisualBasic. The key thing is the compiler is hard-wired to understand AscW and it's not really calling any methods at run time. It just replaces the expression with its integral value at compile time.

– Mehrdad Afshari Jan 14 '10 at 16:21 2 +1, It's slightly more complicated than that. AscW is both well understood by the compiler and a feature of the VB runtime. In the case of a constant and valid expression, the compiler will optimize out the AscW call.

But in cases where it's not constant or not understood, it will defer to the VB runtime. – JaredPar Jan 14 '10 at 16:39 1 @Josh: VB. NET (unlike C#) does not support implicit coercions from character to integers.

This design decision makes simply writing "EnumMember = "A"c not work. It's not really a matter of ease of implementation. – Mehrdad Afshari Jan 14 '10 at 18:33.

Try this: public enum Status { Open = 'O', Closed = 'C', Pending = 'P', EnRoute = 'E' }.

Thank you, yes I will up-vote this too becuase there was only seconds apart in your answers. You guys are fast! – Josh Stodola Jan 14 '10 at 16:12.

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