fix(managed): Fix schema size

Author: samyycX

managed/src/SwiftlyS2.Shared/Modules/Schemas/SchemaSize.cs

@@ -8,27 +8,29 @@ public static class SchemaSize
 {
     private static readonly ConcurrentDictionary<Type, int> _sizeCache = new();
 
+    public static int GetSize<T>() where T : ISchemaClass<T>
+    {
+        return T.Size;
+    }
     public static int Get<T>()
     {
         return _sizeCache.GetOrAdd(typeof(T), static type =>
         {
-            foreach (var iface in type.GetInterfaces())
+            var interfaces = type.GetInterfaces();
+            foreach (var iface in interfaces)
             {
                 if (iface.IsGenericType &&
                     iface.GetGenericTypeDefinition() == typeof(ISchemaClass<>) &&
                     iface.GetGenericArguments()[0] == type)
                 {
-                    var sizeProperty = iface.GetProperty("Size",
-                        BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
-
-                    if (sizeProperty != null)
+                    var method = typeof(SchemaSize).GetMethod(nameof(GetSize))?.MakeGenericMethod(type);
+                    if (method != null)
                     {
-                        return (int)sizeProperty.GetValue(null)!;
+                        return (int)method.Invoke(null, null)!;
                     }
                 }
             }
 
             return Unsafe.SizeOf<T>();
         });
-    }
-}
+    }}