C# の単項演算子とは何ですか?

+ - ! ~ ++ -- (type)* & sizeof

sizeof(int)

sizeof(double)

using System;

namespace Demo {

   class Program {

      static void Main(string[] args) {

         Console.WriteLine("The size of int is {0}", sizeof(int));
         Console.WriteLine("The size of int is {0}", sizeof(char));
         Console.WriteLine("The size of short is {0}", sizeof(short));
         Console.WriteLine("The size of long is {0}", sizeof(long));
         Console.WriteLine("The size of double is {0}", sizeof(double));

         Console.ReadLine();
      }
   }
}

The size of int is 4
The size of int is 2
The size of short is 2
The size of long is 8
The size of double is 8