C# 6.0 (C# vNext) 新功能之：Numeric Literal Formats

var num1 = 1234; // 10 进位
var num2 = 0x1234; // 16 进位

var num3 = 0b1010; // 2 进位，代表的 10 进位数字是 10

var num10 = 12345;
var num2 = 0b11000000111001;

var num2 = 0b11_0000_0011_1001;

var num5 = 1_234_567_890; // 10 进位：表示为 123456789
var num6 = 0xFF_FA_88_BC; // 16 进位：换成 10 进位为 4294609084
var num7 = 0b10_01__01_10; // 2 进位：换成 10 进位为 150

[Serializable]
[Flags]
[System.Runtime.InteropServices.ComVisible(true)]
public enum FileAttributes
{
  ReadOnly =          0b00_00_00_00_00_00_01, // 0x0001
  Hidden =            0b00_00_00_00_00_00_10, // 0x0002
  System =            0b00_00_00_00_00_01_00, // 0x0004
  Directory =         0b00_00_00_00_00_10_00, // 0x0010
  Archive =           0b00_00_00_00_01_00_00, // 0x0020
  Device =            0b00_00_00_00_10_00_00, // 0x0040
  Normal =            0b00_00_00_01_00_00_00, // 0x0080
  Temporary =         0b00_00_00_10_00_00_00, // 0x0100
  SparseFile =        0b00_00_01_00_00_00_00, // 0x0200
  ReparsePoint =      0b00_00_10_00_00_00_00, // 0x0400
  Compressed =        0b00_01_00_00_00_00_00, // 0x0800
  Offline =           0b00_10_00_00_00_00_00, // 0x1000
  NotContentIndexed = 0b01_00_00_00_00_00_00, // 0x2000
  Encrypted =         0b10_00_00_00_00_00_00  // 0x4000
}

C# 6.0 (C# vNext) 新功能之：Numeric Literal Formats

原文：http://blog.csdn.net/kendo3065/article/details/40088623