what is serialization, can't i do it for methods or varibales in a class

Could some body explain me why we do serialization an what is profit of this ?

can we put serialize word on method or not, like in the following program on complete class the serialization is done can i do it on a method or a variable

Serializable]
public class StudentInfo
{
    //Default Constructor
    public StudentInfo()
    {

    }
    /// <summary>
    /// Create object of student Class
    /// </summary>
    /// <param name="intRoll">Int RollNumber</param>
    /// <param name="strName">String Name</param>
    public StudentInfo(int intRoll, string strName)
    {
        this.Roll = intRoll;
        this.Name = strName;
    }

    private int intRoll;
    private string strName;
    public int Roll
    {
        get
        {
            return int开发者_运维技巧Roll;
        }
        set
        {
            intRoll = value;
        }
    }

    public string Name
    {
        get
        {
            return strName;
        }
        set
        {
            strName = value;
        }
    }
}

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Serialization is the process of converting object into byte stream which is useful to transport object(i.e remoting) persisting object(i.e files database)

For details you can look at this http://en.wikipedia.org/wiki/Serialization

http://msdn.microsoft.com/en-us/library/182eeyhh(VS.80).aspx

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You need serialization to transform data to XML or Json or for communication with a web service or with AJAX, or for saving or retrieving data in a ASP.NET session or for .NET remoting, which is why you can mark methods as serializable, too.