How to Read and Write to the Same File Simultaneously in C#?

How to Simultaneously Read and Write to a File in C#

When working with files in C#, there may arise a need to perform both read and write operations on the same file. While creating separate instances of StreamReader and StreamWriter might seem like an intuitive approach, it results in an issue where the second action fails.

To effectively read from and write to a file, there's a better alternative:

Using FileStream with File Access and File Share flags:

FileStream fileStream = new FileStream(
      @"c:\words.txt", FileMode.OpenOrCreate, 
      FileAccess.ReadWrite, FileShare.None);

Here's how it works:

• FileMode.OpenOrCreate: If the file exists, it opens it; otherwise, it creates a new one.
• FileAccess.ReadWrite: Allows both reading and writing to the file.
• FileShare.None: Prevents other processes from accessing the file while it's being used.

By utilizing this approach, you create a single stream that supports both reading and writing operations, eliminating the issues encountered when using separate StreamReader and StreamWriter instances.

The above is the detailed content of How to Read and Write to the Same File Simultaneously in C#?. For more information, please follow other related articles on the PHP Chinese website!