C# Set File Attributes Read Only: While working on a c# console application, I have a requirement to make all the files in read-only mode. In short, I need to change the file attribute and make them all read-only to end user. In C# with File.SetAttributes() we can easily set the attribute of any given file. Before writing any code first, we need to import System.IO namespace into our application. In C# we handle files with System.IO, it allows us to read/write any given file. We can also manipulate directories on the file system with System.IO. Here in this article will learn how to set file attributes in C#. You can also check my previous article how to remove the read-only attribute from the file in c#.
File.SetAttributes(): This method is used to sets the specified FileAttributes to the given file.Syntax:
public static void SetAttributes(
string path,
FileAttributes fileAttributes
)C# Code: Here is the bellow written code we set the read-only attribute to the given file.
using System;
using System.IO;
namespace CONSOLE_TUT
{
class Program
{
static void Main(string[] args)
{
string filePath = @"D:DummyTextFile.txt";
File.SetAttributes(filePath, FileAttributes.ReadOnly);
Console.WriteLine("The {0} file is now readonly.", filePath);
Console.ReadLine();
}
}
}
After : 
List of fileAttributes members:
- Archive: The file is a candidate for backup or removal.
- Compressed: The file is compressed.
- Device: Reserved for future use.
- Directory: The file is a directory.
- Encrypted: The file or directory is encrypted. For a file, this means that all data in the file is encrypted. For a directory, this means that encryption is the default for newly created files and directories.
- Hidden: The file is hidden and thus is not included in an ordinary directory listing.
- IntegrityStream: The file or directory includes data integrity support. When this value is applied to a file, all data streams in the file have integrity support. When this value is applied to a directory, all new files and subdirectories within that directory, by default, include integrity support.
- Normal: The file is a standard file that has no special attributes. This attribute is valid only if it is used alone.
- Offline: The file is offline. The data of the file is not immediately available.
- ReadOnly: The file is read-only.
- SparseFile: The file is a sparse file. Sparse files are typically large files whose data consists of mostly zeros.
- System: The file is a system file. That is, the file is part of the operating system or is used exclusively by the operating system.
- Temporary: The file is temporary. A temporary file contains data that is needed while an application is executing but is not needed after the application is finished.
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