SQL CLR Function for Email validation and string Split

/*C#.net function to split string by user defined separator*/using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Text.RegularExpressions;
using System.Collections;
using System.Text;

public partial class Emailvaliator_and_word_splitter
{
 private class SplittedString
 {
 public SqlString splittedString;

 public SplittedString(SqlString splittedstring)
 {
 splittedString = splittedstring;
 }
 }
 [Microsoft.SqlServer.Server.SqlFunction(DataAccess = DataAccessKind.Read,
 FillRowMethodName = "Splitted_Values",
 TableDefinition = "SeparatedString nvarchar(1000)")]
 public static IEnumerable string_splitter(SqlString strtobeSplit, SqlString strSeparator)
 {
 char septr;
 septr = Convert.ToChar(strSeparator.ToString());
 ArrayList resultCollection = new ArrayList();
 string[] results;
 results = strtobeSplit.ToString().Split(septr);
 foreach (string str in results)
 {
 resultCollection.Add(new SplittedString(str));
 }
 return resultCollection;
 // return new SqlString("Hello");
 }
 public static void Splitted_Values(
 object objsplittedValue,
 out SqlString splittedValue)
 {
 SplittedString splittedStr = (SplittedString)objsplittedValue;
 splittedValue = splittedStr.splittedString;
 
 }
};

/* function to validate email address*/
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Server;
using System.Text.RegularExpressions;

public partial class Emailvaliator_and_word_splitter
{
 [Microsoft.SqlServer.Server.SqlFunction]
 public static SqlString emailValidator(SqlString emailAddress)
 {

 bool rtnVal = false;
 string pattern = @"[a-z]+[0-9]*@\w+[.](com|com.uk|com.np|net|com.in)$";
 rtnVal = Regex.IsMatch(emailAddress.ToString(), pattern);
 if (rtnVal)
 return "valid";
 else
 return "invalid";
 }
};
/*========================================*/