diff --git a/SpineViewer/Spine/Implementations/Spine21.cs b/SpineViewer/Spine/Implementations/Spine/Spine21.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine21.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine21.cs
index e80ff4e..7787993 100644
--- a/SpineViewer/Spine/Implementations/Spine21.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine21.cs
@@ -8,10 +8,10 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime21;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V21)]
-    internal class Spine21 : Spine
+    internal class Spine21 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime21.TextureLoader
         {
diff --git a/SpineViewer/Spine/Implementations/Spine36.cs b/SpineViewer/Spine/Implementations/Spine/Spine36.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine36.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine36.cs
index dee9c41..bc8e387 100644
--- a/SpineViewer/Spine/Implementations/Spine36.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine36.cs
@@ -8,10 +8,10 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime36;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V36)]
-    internal class Spine36 : Spine
+    internal class Spine36 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime36.TextureLoader
         {
diff --git a/SpineViewer/Spine/Implementations/Spine37.cs b/SpineViewer/Spine/Implementations/Spine/Spine37.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine37.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine37.cs
index 670d351..08afb90 100644
--- a/SpineViewer/Spine/Implementations/Spine37.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine37.cs
@@ -5,10 +5,10 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime37;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V37)]
-    internal class Spine37 : Spine
+    internal class Spine37 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime37.TextureLoader
         {
diff --git a/SpineViewer/Spine/Implementations/Spine38.cs b/SpineViewer/Spine/Implementations/Spine/Spine38.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine38.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine38.cs
index 0e72cad..ac0dc83 100644
--- a/SpineViewer/Spine/Implementations/Spine38.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine38.cs
@@ -7,12 +7,11 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime38;
 using SpineRuntime38.Attachments;
-using SpineViewer.Spine;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V38)]
-    internal class Spine38 : Spine
+    internal class Spine38 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime38.TextureLoader
         {
diff --git a/SpineViewer/Spine/Implementations/Spine40.cs b/SpineViewer/Spine/Implementations/Spine/Spine40.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine40.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine40.cs
index 4036d8d..4192d04 100644
--- a/SpineViewer/Spine/Implementations/Spine40.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine40.cs
@@ -7,10 +7,10 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime40;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V40)]
-    internal class Spine40 : Spine
+    internal class Spine40 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime40.TextureLoader
         {
diff --git a/SpineViewer/Spine/Implementations/Spine41.cs b/SpineViewer/Spine/Implementations/Spine/Spine41.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine41.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine41.cs
index a4abe7d..fdd5ae0 100644
--- a/SpineViewer/Spine/Implementations/Spine41.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine41.cs
@@ -7,10 +7,10 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime41;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V41)]
-    internal class Spine41 : Spine
+    internal class Spine41 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime41.TextureLoader
         {
diff --git a/SpineViewer/Spine/Implementations/Spine42.cs b/SpineViewer/Spine/Implementations/Spine/Spine42.cs
similarity index 99%
rename from SpineViewer/Spine/Implementations/Spine42.cs
rename to SpineViewer/Spine/Implementations/Spine/Spine42.cs
index 6c6b6a8..7b6be60 100644
--- a/SpineViewer/Spine/Implementations/Spine42.cs
+++ b/SpineViewer/Spine/Implementations/Spine/Spine42.cs
@@ -7,10 +7,10 @@ using System.Text;
 using System.Threading.Tasks;
 using SpineRuntime42;
 
-namespace SpineViewer.Spine.Implementations
+namespace SpineViewer.Spine.Implementations.Spine
 {
     [SpineImplementation(Version.V42)]
-    internal class Spine42 : Spine
+    internal class Spine42 : SpineViewer.Spine.Spine
     {
         private class TextureLoader : SpineRuntime42.TextureLoader
         {
diff --git a/SpineViewer/Spine/Spine.cs b/SpineViewer/Spine/Spine.cs
index 8f528ef..5a2c9ef 100644
--- a/SpineViewer/Spine/Spine.cs
+++ b/SpineViewer/Spine/Spine.cs
@@ -17,8 +17,6 @@ using System.Globalization;
 
 namespace SpineViewer.Spine
 {
-
-
     /// <summary>
     /// Spine 实现类标记
     /// </summary>
@@ -70,6 +68,8 @@ namespace SpineViewer.Spine
                 var attr = type.GetCustomAttribute<SpineImplementationAttribute>();
                 if (attr is not null)
                 {
+                    if (ImplementationTypes.ContainsKey(attr.Version))
+                        throw new InvalidOperationException($"Multiple implementations found: {attr.Version}");
                     ImplementationTypes[attr.Version] = type;
                 }
             }