build from cli

打开 visual studio prompt

csc a.cs

using System;
namespace HelloWorldApplication
{
   class HelloWorld
   {
      static void Main(string[] args)
      {
         Console.WriteLine("Hello World");
         Console.ReadKey();
      }
   }
}

fmt format string

string.Format("blabla: {0}", 123);
string.Format("blabla: {0:d}", 123);

switch

switch (somevar) 
{
	case 123:
		// do something
		// do more, no need bracket
		break;
	case 456:
	case 457:
		break;
	default:
		break;
}

file

// read file
string content = File.ReadAllText(path, Encoding.UTF8);

// write file
File.WriteAllText(curFile, "blabla");