Command execution result object for CQRS based systems

ExecutionResult.cs

using System;

namespace Example
{
    public abstract class ExecutionResult
    {
        protected ExecutionResult(Guid aggregateId, Guid commandId, DateTime executedOn)
        {
            AggregateId = aggregateId;
            CommandId = commandId;
            ExecutedOn = executedOn;
        }

        public Guid AggregateId { get; private set; }
        public Guid CommandId { get; private set; }
        public DateTime ExecutedOn { get; private set; }
        public abstract bool IsSuccess { get; }

        public class Success : ExecutionResult
        {
            public Success(Guid aggregateId, Guid commandId, DateTime executedOn, int aggregateVersion) : base(aggregateId, commandId, executedOn)
            {
                AggregateVersion = aggregateVersion;
            }

            public override bool IsSuccess => true;
            public int AggregateVersion { get; private set; }
        }

        public class Success<TPayload> : Success
        {
            public Success(Guid aggregateId, Guid commandId, DateTime executedOn, int aggregateVersion, TPayload data) : base(aggregateId, commandId, executedOn, aggregateVersion)
            {
                Data = data;
            }

            public TPayload Data { get; private set; }
        }

        public class Failure : ExecutionResult
        {
            public Failure(Guid aggregateId, Guid commandId, DateTime executedOn, string[] errorMessages) : base(aggregateId, commandId, executedOn)
            {
                ErrorMessages = errorMessages;
            }

            public override bool IsSuccess => false;
            public string[] ErrorMessages { get; private set; }
        }
    }
}

What is the aggregatedId some kind of correlation id ?

AggregateId is an id of an aggregate against which the command is executed. The aggregate concepts comes from Domain-Driven Design.