How Can I Prevent File Collisions When Creating and Writing to Files in C#?

Resolving File Conflicts with File.Create() in C#

Creating and writing to files in C# can lead to errors if another process is already accessing the target file. This often occurs even when using File.Exists() to check for pre-existing files before attempting to create them with File.Create(). The subsequent write operation (e.g., File.AppendText()) then throws an exception.

The common solution involves closing the FileStream created by File.Create() before attempting to write:

<code class="language-csharp">File.Create(filePath).Close();
File.WriteAllText(filePath, FileText); // Corrected to use filePath</code>

While this works, it's not ideal. A more efficient and robust method is to use File.WriteAllText() directly, which handles file creation and overwriting internally:

<code class="language-csharp">File.WriteAllText(filePath, FileText);</code>

This approach eliminates the need for explicit file creation and closure, improving performance and simplifying the code. File.WriteAllText() will create the file if it doesn't exist, or overwrite it if it does. This is generally the preferred method for writing text to files in C#.

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