diff --git a/osu.Framework.Font.Tests/Visual/BackgroundGridTestSample.cs b/osu.Framework.Font.Tests/Visual/BackgroundGridTestSample.cs
index 1ba489c..05d66b8 100644
--- a/osu.Framework.Font.Tests/Visual/BackgroundGridTestSample.cs
+++ b/osu.Framework.Font.Tests/Visual/BackgroundGridTestSample.cs
@@ -80,8 +80,8 @@ protected BackgroundGridTestSample()
         protected IShader GetShader(string shaderName)
             => shaderManager.Load(VertexShaderDescriptor.TEXTURE_2, shaderName);
 
-        protected T GetShaderByType<T>() where T : class, ICustomizedShader
-            => shaderManager.LocalCustomizedShader<T>();
+        protected T GetShaderByType<T>() where T : InternalShader
+            => shaderManager.LocalInternalShader<T>();
 
         protected class DraggableCircle : Circle
         {
diff --git a/osu.Framework.Font/Extensions/ShaderManagerExtensions.cs b/osu.Framework.Font/Extensions/ShaderManagerExtensions.cs
index b6377f8..b30c4f1 100644
--- a/osu.Framework.Font/Extensions/ShaderManagerExtensions.cs
+++ b/osu.Framework.Font/Extensions/ShaderManagerExtensions.cs
@@ -8,18 +8,11 @@ namespace osu.Framework.Extensions
 {
     public static class ShaderManagerExtensions
     {
-        public static T LocalCustomizedShader<T>(this ShaderManager shaderManager) where T : class, ICustomizedShader
+        public static T LocalInternalShader<T>(this ShaderManager shaderManager) where T : InternalShader
         {
-            var type = typeof(T);
-
-            return type switch
-            {
-                Type _ when type == typeof(OutlineShader) => new OutlineShader(shaderManager.Load(VertexShaderDescriptor.TEXTURE_2, OutlineShader.SHADER_NAME)) as T,
-                Type _ when type == typeof(RainbowShader) => new RainbowShader(shaderManager.Load(VertexShaderDescriptor.TEXTURE_2, RainbowShader.SHADER_NAME)) as T,
-                Type _ when type == typeof(ShadowShader) => new ShadowShader(shaderManager.Load(VertexShaderDescriptor.TEXTURE_2, ShadowShader.SHADER_NAME)) as T,
-                Type _ when type == typeof(PixelShader) => new PixelShader(shaderManager.Load(VertexShaderDescriptor.TEXTURE_2, PixelShader.SHADER_NAME)) as T,
-                _ => throw new NotImplementedException()
-            };
+            var shaderName = ((T)Activator.CreateInstance(typeof(T), default(IShader))).ShaderName;
+            var shader = shaderManager.Load(VertexShaderDescriptor.TEXTURE_2, shaderName);
+            return (T)Activator.CreateInstance(typeof(T), shader);
         }
     }
 }
diff --git a/osu.Framework.Font/Graphics/Shaders/InternalShader.cs b/osu.Framework.Font/Graphics/Shaders/InternalShader.cs
new file mode 100644
index 0000000..bfd6306
--- /dev/null
+++ b/osu.Framework.Font/Graphics/Shaders/InternalShader.cs
@@ -0,0 +1,15 @@
+// Copyright (c) andy840119 <andy840119@gmail.com>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+namespace osu.Framework.Graphics.Shaders
+{
+    public abstract class InternalShader : CustomizedShader
+    {
+        public abstract string ShaderName { get; }
+
+        protected InternalShader(IShader originShader)
+            : base(originShader)
+        {
+        }
+    }
+}
diff --git a/osu.Framework.Font/Graphics/Shaders/OutlineShader.cs b/osu.Framework.Font/Graphics/Shaders/OutlineShader.cs
index 893fa2b..6154c6d 100644
--- a/osu.Framework.Font/Graphics/Shaders/OutlineShader.cs
+++ b/osu.Framework.Font/Graphics/Shaders/OutlineShader.cs
@@ -7,9 +7,10 @@
 
 namespace osu.Framework.Graphics.Shaders
 {
-    public class OutlineShader : CustomizedShader
+    public class OutlineShader : InternalShader
     {
-        public const string SHADER_NAME = "Outline";
+        public override string ShaderName => "Outline";
+
         public int Radius { get; set; }
 
         public Color4 OutlineColour { get; set; }
diff --git a/osu.Framework.Font/Graphics/Shaders/PixelShader.cs b/osu.Framework.Font/Graphics/Shaders/PixelShader.cs
index f82a0d3..56ee452 100644
--- a/osu.Framework.Font/Graphics/Shaders/PixelShader.cs
+++ b/osu.Framework.Font/Graphics/Shaders/PixelShader.cs
@@ -6,9 +6,9 @@
 
 namespace osu.Framework.Graphics.Shaders
 {
-    public class PixelShader : CustomizedShader
+    public class PixelShader : InternalShader
     {
-        public const string SHADER_NAME = "Pixel";
+        public override string ShaderName => "Pixel";
 
         public Vector2 Size { get; set; } = new Vector2(5);
 
diff --git a/osu.Framework.Font/Graphics/Shaders/RainbowShader.cs b/osu.Framework.Font/Graphics/Shaders/RainbowShader.cs
index 3dedc1b..e0a5b85 100644
--- a/osu.Framework.Font/Graphics/Shaders/RainbowShader.cs
+++ b/osu.Framework.Font/Graphics/Shaders/RainbowShader.cs
@@ -6,9 +6,9 @@
 
 namespace osu.Framework.Graphics.Shaders
 {
-    public class RainbowShader : CustomizedShader, IApplicableToCurrentTime
+    public class RainbowShader : InternalShader, IApplicableToCurrentTime
     {
-        public const string SHADER_NAME = "Rainbow";
+        public override string ShaderName => "Rainbow";
 
         public Vector2 Uv { get; set; } = new Vector2(0, 1);
 
diff --git a/osu.Framework.Font/Graphics/Shaders/ShadowShader.cs b/osu.Framework.Font/Graphics/Shaders/ShadowShader.cs
index 975b582..1f7370f 100644
--- a/osu.Framework.Font/Graphics/Shaders/ShadowShader.cs
+++ b/osu.Framework.Font/Graphics/Shaders/ShadowShader.cs
@@ -7,9 +7,9 @@
 
 namespace osu.Framework.Graphics.Shaders
 {
-    public class ShadowShader : CustomizedShader
+    public class ShadowShader : InternalShader
     {
-        public const string SHADER_NAME = "Shadow";
+        public override string ShaderName => "Shadow";
 
         public Color4 ShadowColour { get; set; }