The solidity code

pragma solidity ^0.4.24;
event NewEvent(uint32 tag, uint32 idx);

My Nethereum code

public class NewEventDTO
    [Parameter("uint32", "tag", 1, false)]
    public uint Tag { get; set; }

    [Parameter("uint32", "idx", 2, false)]
    public uint Index{ get; set; }

var w = new Web3(mNodeUrl);
var c = w.Eth.GetContract(mAbi, mAdd);
var eNew = c.GetEvent("NewEvent");
var fNew = eNew.CreateFilterAsync().Result;

var en = eNew.GetFilterChanges<NewEventDTO>(fNew).Result; // ** Error

There is no reason for the code above to fail. But it kept on complaining "NewEventDTO is not a valid Event Type"

Hope someone can shed some light in this issue.

Is there any changes in Nethereum where I need to derive my DTO from a specific class?

1 Answer 1


I have found the answer myself after downloading Nethereum source code and trying to debug myself.

The latest version requires us to put the [Event()] attribute for Event DTO

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