We have two ways by which we can rename our file

1.  Move method

2. MoveTo method

1. Move method

Move method move a specified file to a new location.

Syntax:

public static void Move( string sourceFileName, string destinationFileName )

It accepts the two parameters :

1. sourceFileName is a String type which define the name of the file to move.

2. destFileName is a String type which define the new path and name for the file.

Add the following namespace in you C# code

using System;

using System.IO;

C# Code

static void Main(string[] args)
   {
       try
        {   
             if (!File.Exists(@"D:\dta\SubFolder\f2.txt") && File.Exists(@"D:\dta\SubFolder\f1.txt"))
              {
                   File.Move(@"D:\dta\SubFolder\f1.txt", @"D:\dta\SubFolder\f2.txt");
             }
               else 
               {
                   Console.WriteLine("The file is already exists");
              }	
        }
   catch(Exception e)
      {
           Console.WriteLine("TError!!!: {0}", e.ToString());
        }
  }

2. MoveTo method

MoveTo method also move a specified file to a new location.

name.

Syntax:

public void MoveTo( string destFileName )

It accepts only one parameter "destFileName" which is a String type which define the new path and name for a file.

For example,

c:\f1.txt can be moved to d:\public and renamed f2.txt.

Add the following namespace in you C# code

using System;

using System.IO;

C# Code

public static void Main() 
    {
        try
           {
           FileInfo fileInfo = new FileInfo(@"D:\dta\SubFolder\f1.txt");
             {
                if (!File.Exists(@"D:\dta\SubFolder\f2.txt"))
                {
                     fileInfo.MoveTo(@"D:\dta\SubFolder\f2.txt");
                }
              else
                 {
                       Console.WriteLine("The file is already exists");
                   }
              }
          catch(Exception e)
           {
                Console.WriteLine("Error!!!: {0}", e.ToString());
             }
        }