Regular tool class notation for C # common

Using system;using system.collections.generic;using system.linq;using system.text;using System.text.regularexpressions;using system.collections;namespace consoleapplication1{//<summary>//String regular        Match Help class///</summary> public static class Regexhelp {///<summary>//Returns a single regular match value </summary>//<param name= "value" > String </param>//<param name= "regex" > Regular expression string </param>///<returns> String type </returns> public static string Toregexstring (the This string value                , string regex) {if (value = null) {regex re = new regex (regex); Match m = Re.                Match (value);                if (m.success) {return m.value;                } else {return null;            }} else {return null;   }     }///<summary>///return a regular match string array///</summary>//<param name= "value" >         String </param>//<param name= "regex" > Positive expression </param>//<returns> string array </returns> public static string[] Toregexstringarray (This string value, String regex) {string[] array = {            }; if (value = null) {//compatible multi-line matching pattern regex = new Regex (Regex, Regexoptions.multil                INE); MatchCollection MC = RG.                Matches (value); if (MC. Count > 0) {int group = MC.                    Count;                    Array = new String[group]; for (int i = 0; i < group; i++) {array[i] = Mc[i].                    Value;        }}} return array; }//<summary>//To determine if match///</summary>//&LT;PARam Name= "value" > String </param>//<param name= "regex" > Regular expression </param>///<returns>b ool</returns> public static bool Isregex (This string value, string regex) {if (Value! = Nu                ll) {Regex reg = new regex (regex); Return Reg.            IsMatch (value);            } else {return false; }        }    }}

　　

Regular tool class notation for C # common