public class MainClass{
        public static long CountLinesInString(string text)
        {
            long count = 1;
            int start = 0;
            while ((start = text.IndexOf('
', start)) != -1)
            {
                count++;
                start++;
            }
            return count;
        }
}

   
     

   
 
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
public class MainClass{

        public static int NumberOfCharsInStr(ref string stringToSearch, char charToFind)
        {
            int count = 0;
            char[] chars = stringToSearch.ToCharArray();
            foreach (char c in chars)
            {
                if (c == charToFind)
                {
                    count++;
                }
            }
            return count;
        }
}

   
     

//GNU General Public License version 2 (GPLv2)
//http://cbasetest.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace SDFL.Helper
{
public class StrHelper
{
///

///
/// [Dylan] 08/17/2009 Fix bug, if max list exist in the end, can't got it. e.g. “affddccccc”
/// [Dylan] 08/17/2009 Fix bug, if only one continuous list, and in the end, DupList is null, e.g. “aff”
/// [Dylan] 08/17/2009 Fix bug, if only one char. e.g “a”
///
/// /// max count of continuous characters
public static Int32 MaxofDupCharacter(string str)
{
int length = str.Length;
bool isDup = false;
int iPre = 0;
int iLatter = 1;
List DupList = new List();

// [Dylan] 08/17/2009 Fix bug, if only one char. e.g “a”
if (str.Length == 1)
return 1;

for (int i = 0; i < length -1; i++) { if (str[iLatter] == str[iPre]) { isDup = true; // [Dylan] 08/17/2009 Fix bug, if only one continuous list, and in the end, DupList is null, e.g. "aff" if (iLatter == length -1 && DupList.Count == 0) { DupList.Add(iLatter - iPre + 1); } // [Dylan] 08/17/2009 Fix bug, if max list exist in the end, can't got it. e.g. "affddccccc" // if true, it indicate that end region is still a continuous list. if (iPre< iLatter -1) { DupList.Add(iLatter - iPre+1); } } else { if (isDup) { DupList.Add(iLatter - iPre); } isDup = false; iPre = iLatter; } iLatter++; } return int.Parse(DupList.Max().ToString()); } } } [/csharp]

//The MIT License (MIT)
//http://arolibraries.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace AroLibraries.ExtensionMethods.Strings
{
public static class StringExt
{

public static IList Ext_GetUsedChars(this string iString)
{
IList vList = new List();
for (int i = 0; i < iString.Length; i++) { char vChar = iString[i]; char cCharLower = Char.ToLower(vChar); if (!vList.Contains(cCharLower) && Char.IsLetter(cCharLower)) { vList.Add(cCharLower); } } return vList; } } } [/csharp]

   
 

//The MIT License (MIT)
//http://arolibraries.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace AroLibraries.ExtensionMethods.Strings
{
    public static class StringExt
    {

        public static string Ext_Reverse(this string s)
        {
            if (s == null) throw new ArgumentNullException("String is NULL");

            char[] charArray = s.ToCharArray();
            Array.Reverse(charArray);
            return new string(charArray);
        }

    }
}

   
     

   
 

//The MIT License (MIT)
//http://arolibraries.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace AroLibraries.ExtensionMethods.Strings
{
    public static class StringExt
    {
        public static int Ext_CountLinesInString(this string str)
        {
            if (str == null) throw new ArgumentNullException("String is NULL");

            int counter = 1;
            string[] strTemp = str.Split(new string[] { "
" }, StringSplitOptions.None);
            if (strTemp.Length > 0)
            {
                counter = strTemp.Length;
            }
            return counter;
        }

    }
}

   
     

   
 
//The MIT License (MIT)
//http://arolibraries.codeplex.com/license
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace AroLibraries.ExtensionMethods.Strings
{
    public static class StringExt
    {
        public static string Ext_GetRightSideOfString(this string s, int count)
        {
            string newString = String.Empty;
            if (s != null && count > 0)
            {
                int startIndex = s.Length - count;
                if (startIndex > 0)
                    newString = s.Substring(startIndex, count);
                else
                    newString = s;
            }
            return newString;
        }

    }
}