How Can I Efficiently Delete Files and Subfolders from a Directory in C# While Preserving the Root Directory?

C# efficiently deletes files and folders in a directory

When dealing with directories, it is often necessary to delete all contents within the directory while retaining the root directory itself. This can be efficiently achieved through C#’s System.IO.DirectoryInfo class.

Method:

To delete files and subdirectories within a given directory, follow these steps:

1. Create DirectoryInfo object: Create a DirectoryInfo object for the target directory.

   <code class="language-csharp">System.IO.DirectoryInfo di = new DirectoryInfo("YourPath");</code>

2. Delete files: Use GetFiles() or EnumerateFiles() to iterate over the files in a directory.

   <code class="language-csharp">foreach (FileInfo file in di.GetFiles())
   {
       file.Delete();
   }</code>

   For large directories, EnumerateFiles() is more efficient because it allows enumeration to occur before loading the entire collection into memory.

3. Delete directory: Likewise, use GetDirectories() or EnumerateDirectories() to iterate over subdirectories.

   <code class="language-csharp">foreach (DirectoryInfo dir in di.GetDirectories())
   {
       dir.Delete(true);
   }</code>

   Recursively delete subdirectories: Setting the true parameter to Delete() ensures that all subdirectories and files within them are deleted.

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