The Resharper is a commercial plugin for Visual Studio, that makes VS a better IDE. One useful feature of Resharper is to mark useless (unused) code in grey colour, so you know you can remove them safely.
Compare C# enum to null, resharper
The enum type in C# cannot be assigned to null, if you do, you will get a compilation error:
Error 1 Cannot convert null to 'ConsoleApplication3.Program.Days' because it is a non-nullable value type E:\csharp\ConsoleApplication3\ConsoleApplication3\Program.cs 13 19 ConsoleApplication3
However, the syntax is still correct if you try to compare the enum variable to null. However, this always evaluates to false.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | using System; namespace ConsoleApplication3 { class Program { enum Days { Sun, Mon, Tue, Wed, Thu, Fri, Sat }; static void Main(string[] args) { Days day = Days.Fri; day = null; if (day == null) Console.WriteLine("day == null"); } } } |
using System;
namespace ConsoleApplication3
{
class Program
{
enum Days { Sun, Mon, Tue, Wed, Thu, Fri, Sat };
static void Main(string[] args)
{
Days day = Days.Fri;
day = null;
if (day == null) Console.WriteLine("day == null");
}
}
}Resharper helps to do the code review. It makes it easy.
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