Reflect Problem - Githubissues

the function aim to serialize an object to json string use System.Reflect part code snippet in c# like belowing

private static void WriteValue (object obj, JsonWriter writer, bool writer_is_private, int depth){
    Type obj_type = obj.GetType ();  // System.Type
    obj_type.GetProperties ()) ; //     System.Reflection.PropertyInfo[] GetProperties(); // 0x01ff9760
    obj_type. GetFields(); //     System.Reflection.FieldInfo[] GetFields(); // 0x01ff9140
    // public virtual object? GetValue(object? obj, object?[]? index);  System.Reflection.PropertyInfo
}

i want to get value from the object , but the code encounter error

il2cpp: cannot invoke method GetValue: parameter types mismatch

my snippet like belowing

    const assem = Il2Cpp.Domain.assembly("Assembly-CSharp").image;
    const object = assem.class("ProtobufPacket.CG_CARD_MAKE").alloc();
    object.method('.ctor').invoke()

    const type = object.tryMethod<Il2Cpp.Object>("GetType").invoke();

    const properties = type.tryMethod<Il2Cpp.Array>("GetProperties" , 0).invoke();
    const fields = type.tryMethod<Il2Cpp.Array>("GetFields" , 0).invoke();

    for(let property of properties){
        const propertyInfo = property as Il2Cpp.Object // System.Reflection.PropertyInfo 
        console.log(propertyInfo.tryMethod("get_Name").invoke())

        // System.Object GetValue(System.Object obj, System.Object[] index); // 0x0183bf4c
        propertyInfo.tryMethod("GetValue").invoke(object , 0); // args0 ??  
    }

    console.log(properties , fields)

console output

"has_itemnum"   // property name 
il2cpp: cannot invoke method GetValue: parameter types mismatch // getValue failed

why object type mismatch the function GetValue args[0] ?? i am very confused , the object is inhert from System.Object . so can you help me ? thanks

reference link https://learn.microsoft.com/en-us/dotnet/api/system.reflection.propertyinfo.getvalue?view=netcore-3.1

vfsfitvnm / frida-il2cpp-bridge

Reflect Problem #228