Use ThrowHelper

src/ImageSharp/Formats/Gif/GifDecoder.cs

@@ -38,7 +38,10 @@ namespace SixLabors.ImageSharp.Formats.Gif
             {
                 Size dims = decoder.Dimensions;
 
-                throw new InvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {dims.Width}x{dims.Height}.", ex);
+                GifThrowHelper.ThrowInvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {dims.Width}x{dims.Height}.", ex);
+
+                // Not reachable, as the previous statement will throw a exception.
+                return null;
             }
         }
 

src/ImageSharp/Formats/Gif/GifThrowHelper.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Six Labors and contributors.
 // Licensed under the Apache License, Version 2.0.
 
+using System;
 using System.Runtime.CompilerServices;
 
 namespace SixLabors.ImageSharp.Formats.Gif
@@ -11,8 +12,17 @@ namespace SixLabors.ImageSharp.Formats.Gif
         /// Cold path optimization for throwing <see cref="InvalidImageContentException"/>'s
         /// </summary>
         /// <param name="errorMessage">The error message for the exception.</param>
-        [MethodImpl(MethodImplOptions.NoInlining)]
+        [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowInvalidImageContentException(string errorMessage)
             => throw new InvalidImageContentException(errorMessage);
+
+        /// <summary>
+        /// Cold path optimization for throwing <see cref="InvalidImageContentException"/>'s.
+        /// </summary>
+        /// <param name="errorMessage">The error message for the exception.</param>
+        /// <param name="innerException">The exception that is the cause of the current exception, or a null reference
+        /// if no inner exception is specified.</param>
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowInvalidImageContentException(string errorMessage, Exception innerException) => throw new InvalidImageContentException(errorMessage, innerException);
     }
 }

src/ImageSharp/Formats/Jpeg/JpegDecoder.cs

@@ -32,7 +32,10 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
             {
                 (int w, int h) = (decoder.ImageWidth, decoder.ImageHeight);
 
-                throw new InvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {w}x{h}.", ex);
+                JpegThrowHelper.ThrowInvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {w}x{h}.", ex);
+
+                // Not reachable, as the previous statement will throw a exception.
+                return null;
             }
         }
 

src/ImageSharp/Formats/Jpeg/JpegThrowHelper.cs

@@ -15,6 +15,15 @@ namespace SixLabors.ImageSharp.Formats.Jpeg
         [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowInvalidImageContentException(string errorMessage) => throw new InvalidImageContentException(errorMessage);
 
+        /// <summary>
+        /// Cold path optimization for throwing <see cref="InvalidImageContentException"/>'s.
+        /// </summary>
+        /// <param name="errorMessage">The error message for the exception.</param>
+        /// <param name="innerException">The exception that is the cause of the current exception, or a null reference
+        /// if no inner exception is specified.</param>
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowInvalidImageContentException(string errorMessage, Exception innerException) => throw new InvalidImageContentException(errorMessage, innerException);
+
         /// <summary>
         /// Cold path optimization for throwing <see cref="NotImplementedException"/>'s
         /// </summary>

src/ImageSharp/Formats/Png/PngDecoder.cs

@@ -54,7 +54,10 @@ namespace SixLabors.ImageSharp.Formats.Png
             {
                 Size dims = decoder.Dimensions;
 
-                throw new InvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {dims.Width}x{dims.Height}.", ex);
+                PngThrowHelper.ThrowInvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {dims.Width}x{dims.Height}.", ex);
+
+                // Not reachable, as the previous statement will throw a exception.
+                return null;
             }
         }
 

src/ImageSharp/Formats/Png/PngThrowHelper.cs

@@ -11,6 +11,10 @@ namespace SixLabors.ImageSharp.Formats.Png
     /// </summary>
     internal static class PngThrowHelper
     {
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowInvalidImageContentException(string errorMessage, Exception innerException)
+            => throw new InvalidImageContentException(errorMessage, innerException);
+
         [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowNoHeader() => throw new InvalidImageContentException("PNG Image does not contain a header chunk");
 

src/ImageSharp/Formats/Tga/TgaDecoder.cs

@@ -28,7 +28,10 @@ namespace SixLabors.ImageSharp.Formats.Tga
             {
                 Size dims = decoder.Dimensions;
 
-                throw new InvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {dims.Width}x{dims.Height}.", ex);
+                TgaThrowHelper.ThrowInvalidImageContentException($"Can not decode image. Failed to allocate buffers for possibly degenerate dimensions: {dims.Width}x{dims.Height}.", ex);
+
+                // Not reachable, as the previous statement will throw a exception.
+                return null;
             }
         }
 

src/ImageSharp/Formats/Tga/TgaThrowHelper.cs

@@ -12,15 +12,25 @@ namespace SixLabors.ImageSharp.Formats.Tga
         /// Cold path optimization for throwing <see cref="ImageFormatException"/>'s
         /// </summary>
         /// <param name="errorMessage">The error message for the exception.</param>
-        [MethodImpl(MethodImplOptions.NoInlining)]
+        [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowInvalidImageContentException(string errorMessage)
             => throw new InvalidImageContentException(errorMessage);
 
+        /// <summary>
+        /// Cold path optimization for throwing <see cref="ImageFormatException"/>'s
+        /// </summary>
+        /// <param name="errorMessage">The error message for the exception.</param>
+        /// <param name="innerException">The exception that is the cause of the current exception, or a null reference
+        /// if no inner exception is specified.</param>
+        [MethodImpl(InliningOptions.ColdPath)]
+        public static void ThrowInvalidImageContentException(string errorMessage, Exception innerException)
+            => throw new InvalidImageContentException(errorMessage, innerException);
+
         /// <summary>
         /// Cold path optimization for throwing <see cref="NotSupportedException"/>'s
         /// </summary>
         /// <param name="errorMessage">The error message for the exception.</param>
-        [MethodImpl(MethodImplOptions.NoInlining)]
+        [MethodImpl(InliningOptions.ColdPath)]
         public static void ThrowNotSupportedException(string errorMessage)
             => throw new NotSupportedException(errorMessage);
     }