using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        MrmMsgProvider msg = default;

        msg = new MrmMsgProvider();

        msg.SchemaVersion = 2;

        msg.KeyType = "1";

        msg.KeyValue = "2";

        msg.MrmProvider = "3";

        msg.MrmMsgType = "4";

        bool isTrue = IsValidForSupplyFeed(msg);

        Console.WriteLine(isTrue);

    }

    public static bool IsValidForSupplyFeed(MrmMsgProvider msg)

        {

            if (

                msg is null

                || (msg.SchemaVersion <= 1)

                || string.IsNullOrWhiteSpace(msg.MrmProvider)

                || string.IsNullOrWhiteSpace(msg.KeyType)

                || string.IsNullOrWhiteSpace(msg.KeyValue)

                || string.IsNullOrWhiteSpace(msg.MrmMsgType))

            {

                return false;

            }

            return true;

        }

}

​

public class MrmMsgProvider : MrmMsg

    {

        public MrmMsgProvider()

        {

        }

​

        public MrmMsgProvider(MrmMsg mrmMsg) : base(mrmMsg)

        {

        }

​

        public MrmMsgProvider(MrmMsgProvider mrmMsg) : base(mrmMsg)

        {

            this.MrmProvider = mrmMsg.MrmProvider;

        }

        public string? MrmProvider { get; set; }

    }

public class MrmMsg

    {

        public MrmMsg() { }

​

        public MrmMsg(MrmMsg mrmMsg) : this()

        {

            this.DataVersion = mrmMsg.DataVersion;

            this.KeyType = mrmMsg.KeyType;

            this.KeyValue = mrmMsg.KeyValue;

            this.MrmMsgType = mrmMsg.MrmMsgType;

            this.Payload = mrmMsg.Payload;

            this.SchemaVersion = mrmMsg.SchemaVersion;

        }

​

        public long DataVersion { get; set; }

        public string? KeyType { get; set; }

        public string? KeyValue { get; set; }

        public string? MrmMsgType { get; set; }

        public dynamic? Payload { get; set; }

        public int SchemaVersion { get; set; }

    }