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What is the difference between a field and a property in C#?

i would like to know the difference between a variable and a property.can any one explain

Answer 1

Simply you can’t validate the data being stored in variable but in a Property you can.
A Propery is more like a method as it has get & set methods which you define to handle the data.

Also they are usefull in Databinding.

Properties expose fields. Fields should (almost always) be kept private to a class and accessed via get and set properties. Properties provide a level of abstraction allowing you to change the fields while not affecting the external way they are accessed by the things that use your class.

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Example:

like in case of Date of Birth. You need to validate that age is less then todays date:

In a Field this is valid:

DateTime age = new DateTime(2012,12,1);//1 december 2012

But in a property you can validate it:

private DateTime _dob;
public DateTime dob
{
    get
    {
        if(_dob!= null) return _dob;
    }
    set
    {
        if(DateTime.Compare(value, DateTime.Today) <= 0)
        {
             _dob= value;
        }
        else
        {
               throw new System.InvalidOperationException("Date of Birth should be less then today's date");
        }
    }
}