C# Rename File

In C#, you can rename a file using the File class from the System.IO namespace. Renaming a file can be useful when you need to change the name of a file for organizational purposes or to avoid naming conflicts. In this tutorial, we'll discuss how to rename a file in C#.

Syntax

The syntax for renaming a file in C# is as follows:

File.Move(sourceFileName, destFileName);

Where sourceFileName is the name of the file to be renamed, and destFileName is the new name for the file.

Example

Let's say we have a file called "oldfile.txt" in the current directory, and we want to rename it to "newfile.txt". Here's how we can implement it:

using System.IO;

public class Program {
   static void Main(string[] args) {
      string oldFileName = "oldfile.txt";
      string newFileName = "newfile.txt";
      File.Move(oldFileName, newFileName);
   }
}

Now, when we run the program, the "oldfile.txt" will be renamed to "newfile.txt".

Output

When we run the example code above, no output will be generated. However, if we check the current directory, we'll notice that the file name has been changed to "newfile.txt".

Explanation

In the example above, we used the File class from the System.IO namespace to rename a file. We passed two parameters to the File.Move method: the old file name, and the new file name. The File.Move method then renamed the file.

Use

Renaming a file can be useful in situations where you need to change the name of a file for organizational purposes, to avoid naming conflicts, or to update the name of a file to reflect its contents or purpose.

Important Points

• When using the File.Move method to rename a file, make sure that the destination file name does not already exist, otherwise the method will fail.
• When renaming a file, make sure that the file is not open in any other application, otherwise the File.Move method will throw an IOException.
• When renaming a file, make sure that the file is in a directory to which you have write access.

Summary

In this tutorial, we discussed how to rename a file in C#. We covered the syntax, example, output, explanation, use, and important points of renaming files in C#. With this knowledge, you can now use the File class from the System.IO namespace to rename files in your C# applications.