using System;

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                    public class Stringfunctions

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{

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    public static void Main()

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    {

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        // 1.String Compare()

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        string s1 = "Madhavan";

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        string s2 = "madhavan";

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        string s3 = "Maddy";

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        Console.WriteLine("string compare:" + string.Compare(s1,s2));

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        Console.WriteLine(string.Compare(s2,s3));   

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 2.String Concat()

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        Console.WriteLine("string concat:" + string.Concat(s1,s3));

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 3.String Contains()

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        string s4 = "mo";

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        string s5 = "ma";

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        Console.WriteLine("string contains:" + s1.Contains(s4));

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        Console.WriteLine(s1.Contains(s5));

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 4.String  Copy()

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        string s6 = string.Copy(s3);

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        Console.WriteLine("string copy:" + s3);

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        Console.WriteLine(s6);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 5.String EndsWith()

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        Console.WriteLine("string endswith:" + s1.EndsWith(s2));

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        Console.WriteLine(s1.EndsWith(s3));

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 6.String Equals()

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        Console.WriteLine("String Equals:" + s1.Equals(s2));

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        Console.WriteLine(s1.Equals(s5));

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 7.String Enumerator()

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        CharEnumerator a = s3.GetEnumerator();

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        while(a.MoveNext())

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        {

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            Console.WriteLine(a.Current);

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        }

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 8.String HashCode()

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        Console.WriteLine("String HashCode:" + s2.GetHashCode());

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 9.String IsNullOrEmpty()

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        string s7 = "";

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        bool k= string.IsNullOrEmpty(s7);

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        bool k1= string.IsNullOrEmpty(s1);

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        Console.WriteLine("String IsNullOrEmpty:" + k);

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        Console.WriteLine(k1);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 10.String Indexof()

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        int i = s1.IndexOf('d');

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        Console.WriteLine("String Indexof:" + i);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 11.String IsNullOrWhiteSpace()

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        string s8 = " ";

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        bool h= string.IsNullOrWhiteSpace(s7);

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        bool h1= string.IsNullOrWhiteSpace(s1);

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        bool h2 = string.IsNullOrWhiteSpace(s8);

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        Console.WriteLine("String IsNullOrWhiteSpace:" + h);

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        Console.WriteLine(h1);

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        Console.WriteLine(h2);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 12.String Join()

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        string[] s9 = {"i","am","Madhavan"};

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        string s10 = string.Join("-",s9);

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        Console.WriteLine("String Join:" + s10);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 13.String padleft()

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        string s11 = s1.PadLeft(15);

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        Console.WriteLine("String padleft:" + s11);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        //14.String Remove()

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        string s12 = s1.Remove(2);

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        Console.WriteLine("string Remove:"  + s12);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        //15. string REplace()

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        string s13 = "Madhavan";

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        string s14 = s13.Replace('d','n');

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        Console.WriteLine("String Replace:" + s14);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 16.String Startswith()

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        bool b = s1.StartsWith("M");

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        bool b1 = s1.StartsWith("M");   

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        Console.WriteLine("string Startswith:" + b);

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        Console.WriteLine("string Startswith:" + b1);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 17.string ToLower()

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        string s15 = "MADHAVAN";

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        string s16 = s15.ToLower();

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        Console.WriteLine("string tolower:" + s16);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 18.string ToUpper

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        string s17 = s1.ToUpper();

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        Console.WriteLine("string toupper:" + s17);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 19.string Tostring()

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        int c = 12345;

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        string s18 = c.ToString();

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        Console.WriteLine("String ToString:" + s18);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 20.string TrimEnd()

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        char[] d = {'M'};

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        string s19 = s1.TrimStart(d);

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        Console.WriteLine("String TrimEnd:" + s19);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 21.string length()

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        int len = s1.Length;

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        Console.WriteLine("string Lenght:" + len);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 22.string gettype()

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        Console.WriteLine("Gettype:" + s1.GetType());

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 23.string gettypecode()

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        Console.WriteLine("Gettypecode:" + s1.GetTypeCode());

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 24.String Substring

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        string s20 = "durai karthi";

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        string s21 = s20.Substring(0,5);

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        string s22 = s20.Substring(5);

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        Console.WriteLine("String Substrig:" + s21);

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        Console.WriteLine("String Substrig:" + s22);

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        Console.WriteLine("-------------------------------------------------------------------------------------------------------");

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        // 25.string clone()

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        string s23 = (String) s3.Clone();

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        Console.WriteLine(s3);

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        Console.WriteLine(s23);

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    }

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}

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