diff --git a/ILRuntime/Reflection/ILRuntimeConstructorInfo.cs b/ILRuntime/Reflection/ILRuntimeConstructorInfo.cs
index 354a7853..07037139 100644
--- a/ILRuntime/Reflection/ILRuntimeConstructorInfo.cs
+++ b/ILRuntime/Reflection/ILRuntimeConstructorInfo.cs
@@ -20,7 +20,8 @@ public ILRuntimeConstructorInfo(ILMethod m)
             parameters = new ILRuntimeParameterInfo[m.ParameterCount];
             for(int i = 0; i < m.ParameterCount; i++)
             {
-                parameters[i] = new ILRuntimeParameterInfo(m.Parameters[i], this);
+                var pd = m.Definition.Parameters[i];
+                parameters[i] = new ILRuntimeParameterInfo(pd, m.Parameters[i], this);
             }
         }
 
diff --git a/ILRuntime/Reflection/ILRuntimeMethodInfo.cs b/ILRuntime/Reflection/ILRuntimeMethodInfo.cs
index b5528abf..ed717cd0 100644
--- a/ILRuntime/Reflection/ILRuntimeMethodInfo.cs
+++ b/ILRuntime/Reflection/ILRuntimeMethodInfo.cs
@@ -27,7 +27,8 @@ public ILRuntimeMethodInfo(ILMethod m)
             parameters = new ILRuntimeParameterInfo[m.ParameterCount];
             for (int i = 0; i < m.ParameterCount; i++)
             {
-                parameters[i] = new ILRuntimeParameterInfo(m.Parameters[i], this);
+                var pd = m.Definition.Parameters[i];
+                parameters[i] = new ILRuntimeParameterInfo(pd, m.Parameters[i], this);
             }
         }
 
diff --git a/ILRuntime/Reflection/ILRuntimeParameterInfo.cs b/ILRuntime/Reflection/ILRuntimeParameterInfo.cs
index 64a33c7d..ce6ba709 100644
--- a/ILRuntime/Reflection/ILRuntimeParameterInfo.cs
+++ b/ILRuntime/Reflection/ILRuntimeParameterInfo.cs
@@ -13,12 +13,15 @@ public class ILRuntimeParameterInfo : ParameterInfo
     {
         IType type;
         MethodBase method;
+        Mono.Cecil.ParameterDefinition definition;
 
-        public ILRuntimeParameterInfo(IType type, MethodBase method)
+        public ILRuntimeParameterInfo(Mono.Cecil.ParameterDefinition definition, IType type, MethodBase method)
         {
             this.type = type;
             this.method = method;
             this.MemberImpl = method;
+            this.definition = definition;
+            NameImpl = definition.Name;
         }
         public override Type ParameterType
         {
@@ -27,13 +30,5 @@ public override Type ParameterType
                 return type.ReflectionType;
             }
         }
-
-        public override string Name
-        {
-            get
-            {
-                return type.FullName;
-            }
-        }
     }
 }