Update USAGE.md to remove problematic extraction example

USAGE.md

@@ -71,14 +71,18 @@ using (var archive = ZipArchive.Create())
 memoryStream.Position = 0;
 ```
 
-### Extract all files from a Rar file to a directory using RarArchive
+### Extract all files from a rar file to a directory using RarArchive
+
+Note: Extracting a solid rar or 7z file needs to be done in sequential order to get acceptable decompression speed.
+It is explicitly recommended to use `ExtractAllEntries` when extracting an entire `IArchive` instead of iterating over all its `Entries`.
+Alternatively, use `IArchive.WriteToDirectory`.
 
 ```C#
 using (var archive = RarArchive.Open("Test.rar"))
 {
-    foreach (var entry in archive.Entries.Where(entry => !entry.IsDirectory))
+    using (var reader = archive.ExtractAllEntries())
     {
-        entry.WriteToDirectory("D:\\temp", new ExtractionOptions()
+        reader.WriteAllToDirectory(@"D:\temp", new ExtractionOptions()
         {
             ExtractFullPath = true,
             Overwrite = true
@@ -87,6 +91,18 @@ using (var archive = RarArchive.Open("Test.rar"))
 }
 ```
 
+### Iterate over all files from a Rar file using RarArchive
+
+```C#
+using (var archive = RarArchive.Open("Test.rar"))
+{
+    foreach (var entry in archive.Entries.Where(entry => !entry.IsDirectory))
+    {
+        Console.WriteLine($"{entry.Key}: {entry.Size} bytes");
+    }
+}
+```
+
 ### Use ReaderFactory to autodetect archive type and Open the entry stream
 
 ```C#