There are times when you want to clone an object in C# but it's tedious to copy manually all the properties. This solution uses JSON serialization to clone objects. Below is the code using the Newtonsoft.Json NuGet package which can be used in any .NET version including .NET Framework and the second one is using the System.Text.Json which is already included in .NET 5 or later.

public static class ObjectExtensions
    {
        public static T CloneJson<T>(this T source)
        {
            if(ReferenceEquals(source, null))
            {
                return default;
            }

            var deserializeSettings = new JsonSerializerSettings
            {
                ObjectCreationHandling = ObjectCreationHandling.Replace
            };

            return JsonConvert.DeserializeObject<T>(JsonConvert.SerializeObject(source), deserializeSettings);
        }
    }

public static class ObjectExtensions
    {
        public static T CloneJson<T>(this T source)
        {
            if(ReferenceEquals(source, null))
            {
                return default;
            }

            var deserializeSettings = new JsonSerializerOptions
            {
                IncludeFields = true,
                PropertyNameCaseInsensitive = true
            };

            return JsonSerializer.Deserialize<T>(JsonSerializer.Serialize(source), deserializeSettings);
        }
    }

Note*: Private members are not cloned using this JSON method.*

Resources

Deep cloning objects

How to serialize and deserialize (marshal and unmarshal) JSON in .NET