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// .

Using System;

class TrimPadDemo { static void Main() { string str = "";

Console.WriteLine(" : " + str);

// , str = str.PadLeft(10);

Console.WriteLine("I" + str + "I");

// , str = str.PadRight(20);

Console.WriteLine("I" + str + "I");

// , str = str.Trim();

Console.WriteLine("|" + str + "I");

// # , str = str.PadLeft (10, '#');

Console.WriteLine ("|" + str + "I");

// # , str = str.PadRight(20, '#');

Console.WriteLine("|" + str + "I");

// #. str = str.Trim('#');

Console.WriteLine("|" + str + "|");

}

}

.

: I |

| |

||

I ######|

|################|

I |

,

Insert (): public string Insert(int startlndex, string value)

value , startlndex. .

Remove (). .

public string Remove(int startlndex)

public string Remove(int startlndex, int count)

Remove () , , startlndex, . , count, , startlndex. .

Replace (). .

public string Replace(char oldChar, char newChar) public string Replace(string oldValue, string newValue)

Replace () oldChar newChar. oldValue newValue. .

Insert (), Remove () Replace().

// , .

Using System;

class InsRepRevDemO { static void Main() {

string str = " ";

Console.WriteLine(" : " + str);

// .

str = str.Insert(4, " ");

Console.WriteLine(str);

// .

str = str.Replace("", " ");

Console.WriteLine (str);

// str = str.Replace('', 'X');

Console.WriteLine(str);

// , str = str.Remove(4, 5);

Console.WriteLine(str);

.

: _

String , , ToUpper () ToLower (). .

Public string ToLower() public string ToUpper()

ToLower () , ToUpper () . . , .

public string ToLower (Culturelnfo culture) public string ToUpper(Culturelnfo culture)

. .

, ToUpper Invariant () ToLowerlnvariant().

Public string ToUpperlnvariant () public string ToLowerlnvariant()





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