example.cs

using ProtoBuf;
using System;
static class Program

{
    static void Main()
    {
        ReadOnlyMemory<byte> bytes = Convert.FromBase64String("CgYI3KzdiQYQidgLGgAgZiokNzk4M2Y0YjAtYjQ3My00NTY1LTkyMWUtMzI5NDk3YjAwMzQy");
        var finalValue = Serializer.Deserialize<ileco.chimp.proto.FinalValue>(bytes);
        Console.WriteLine(finalValue.inputGuid); // 7983f4b0-b473-4565-921e-329497b00342
        Console.WriteLine(finalValue.inputId); // 191497
        Console.WriteLine(finalValue.sourceId); // 102
        Console.WriteLine(finalValue.Timestamp); // 07/09/2021 12:09:00
        Console.WriteLine(finalValue.Value?.Value); // 0
    }
}

namespace Google.Protobuf.WellKnownTypes
{
    [ProtoContract]
    public sealed class DoubleValue
    {
        [ProtoMember(1)]
        public double Value { get; set; }
    }
}

// <auto-generated>
//   This file was generated by a tool; you should avoid making direct changes.
//   Consider using 'partial classes' to extend these types
//   Input: my.proto
// </auto-generated>

#region Designer generated code
#pragma warning disable CS0612, CS0618, CS1591, CS3021, IDE0079, IDE1006, RCS1036, RCS1057, RCS1085, RCS1192
namespace ileco.chimp.proto
{

    [global::ProtoBuf.ProtoContract()]
    public partial class FinalValue : global::ProtoBuf.IExtensible
    {
        private global::ProtoBuf.IExtension __pbn__extensionData;
        global::ProtoBuf.IExtension global::ProtoBuf.IExtensible.GetExtensionObject(bool createIfMissing)
            => global::ProtoBuf.Extensible.GetExtensionObject(ref __pbn__extensionData, createIfMissing);

        [global::ProtoBuf.ProtoMember(1, Name = @"timestamp", DataFormat = global::ProtoBuf.DataFormat.WellKnown)]
        public global::System.DateTime? Timestamp { get; set; }

        [global::ProtoBuf.ProtoMember(2)]
        public uint inputId { get; set; }

        [global::ProtoBuf.ProtoMember(3, Name = @"value")]
        public global::Google.Protobuf.WellKnownTypes.DoubleValue Value { get; set; }

        [global::ProtoBuf.ProtoMember(4)]
        public uint sourceId { get; set; }

        [global::ProtoBuf.ProtoMember(5)]
        [global::System.ComponentModel.DefaultValue("")]
        public string inputGuid { get; set; } = "";

    }

}
#pragma warning restore CS0612, CS0618, CS1591, CS3021, IDE0079, IDE1006, RCS1036, RCS1057, RCS1085, RCS1192
#endregion