C# .NET - four important function of string in c#?

hi all,
 i want to known the four important function of the string in c#...

please give me some example so that it can help me in much better manner.

thanks

HI

these are the functions

hi,

hi,

To write efficient string handling functions, it is important to understand the characteristics of string objects in C#.
String Characteristics
 
First and foremost it is important to know that strings in .NET are class objects. There is no difference between the types System.String and string, they are both class objects. Unlike value types, class objects are stored in the heap (instead of the stack). This is an important fact because it means that creating a string object can trigger garbage collection, which is costly in terms of performance. In terms of string functions, this means we want to avoid creating new strings as much as possible.
 
However that is easier said than done. Another important thing about strings in .NET is that they are immutable. This means string objects cannot be modified. To edit a string object, you have to instead create a new string that will have the modification.
 
http://www.dotnetcurry.com/ShowArticle.aspx?ID=463

Hi,

1 . Split

Example

using System;

class Program
{
    static void Main()
    {
	string s = "there is a cat";
	//
	// Split string on spaces.
	// ... This will separate all the words.
	//
	string[] words = s.Split(' ');
	foreach (string word in words)
	{
	    Console.WriteLine(word);
	}
    }
}

Output

there
is
a
cat

2. CopyTo 

Example

using System;

class Program
{
    static void Main()
    {
	// Declare a string constant and an output array.
	string value1 = "Dot Net Perls";
	char[] array1 = new char[3];
	// Copy the fifth, sixth, and seventh characters to the array.
	value1.CopyTo(4, array1, 0, 3);
	// Output the array we copied to.
	Console.WriteLine("--- Destination array ---");
	Console.WriteLine(array1.Length);
	Console.WriteLine(array1);
    }
}

Output

--- Destination array ---
3
Net
3. StartsWith



Example
using System;

class Program
{
    static void Main()
    {
	// The input string.
	string input = "http://site.com/test.html";

	// See if input matches one of these starts.
	if (input.StartsWith("http://www.site.com") ||
	    input.StartsWith("http://site.com"))
	{
	    // Write to the screen.
	    Console.WriteLine(true);
	}
    }
}

Output

True
4. Replace
Example
using System;

class Program
{
    static void Main()
    {
	const string s = "Darth Vader is scary.";
	Console.WriteLine(s);

	// Note:
	// You must assign the result of Replace to a new string.
	string v = s.Replace("scary", "not scary");
	Console.WriteLine(v);
    }
}

Output

Darth Vader is scary.
Darth Vader is not scary.

If you want to know more function visit folloiwng site

http://www.dotnetperls.com/string

Hope this helps!