From 7e85b1e27eaa3926e9a2b38c413fc31721e365ef Mon Sep 17 00:00:00 2001
From: Brian Popow <popow@gmx.de>
Date: Wed, 20 Oct 2021 17:19:52 +0200
Subject: [PATCH] Use dispose pattern

---
 .../Formats/Webp/BitReader/BitReaderBase.cs   | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/ImageSharp/Formats/Webp/BitReader/BitReaderBase.cs b/src/ImageSharp/Formats/Webp/BitReader/BitReaderBase.cs
index 47d1581237..f11f2a1100 100644
--- a/src/ImageSharp/Formats/Webp/BitReader/BitReaderBase.cs
+++ b/src/ImageSharp/Formats/Webp/BitReader/BitReaderBase.cs
@@ -13,6 +13,8 @@ namespace SixLabors.ImageSharp.Formats.Webp.BitReader
     /// </summary>
     internal abstract class BitReaderBase : IDisposable
     {
+        private bool isDisposed;
+
         /// <summary>
         /// Gets or sets the raw encoded image data.
         /// </summary>
@@ -31,7 +33,26 @@ namespace SixLabors.ImageSharp.Formats.Webp.BitReader
             input.Read(dataSpan.Slice(0, bytesToRead), 0, bytesToRead);
         }
 
+        protected virtual void Dispose(bool disposing)
+        {
+            if (this.isDisposed)
+            {
+                return;
+            }
+
+            if (disposing)
+            {
+                this.Data?.Dispose();
+            }
+
+            this.isDisposed = true;
+        }
+
         /// <inheritdoc/>
-        public void Dispose() => this.Data?.Dispose();
+        public void Dispose()
+        {
+            this.Dispose(disposing: true);
+            GC.SuppressFinalize(this);
+        }
     }
 }