using System;

​

public enum StringComparison 

{ 

    CurrentCulture = 0, 

    CurrentCultureIgnoreCase = 1, 

    InvariantCulture = 2, 

    InvariantCultureIgnoreCase = 3, 

    Ordinal = 4, 

    OrdinalIgnoreCase = 5 

}

​

 [Flags]

 public enum CompareOptions

 {

     None = 0,

     IgnoreCase = 1,

     IgnoreNonSpace = 2,

     IgnoreSymbols = 4,

     IgnoreKanaType = 8,

     IgnoreWidth = 0x00000010,

     Ordinal = 0x40000000,

     OrdinalIgnoreCase = 0x10000000,

     StringSort = 0x20000000

 }