Writing mapping method is machine job. Do not waste your time, let Mapster do it.

PM> Install-Package Mapster

Mapster creates the destination object and maps values to it.

var destObject = sourceObject.Adapt<Destination>();

You make the object, Mapster maps to the object.

sourceObject.Adapt(destObject);

Mapster also provides extensions to map queryables.

using (MyDbContext context = new MyDbContext())
{
    // Build a Select Expression from DTO
    var destinations = context.Sources.ProjectToType<Destination>().ToList();

    // Versus creating by hand:
    var destinations = context.Sources.Select(c => new Destination {
        Id = p.Id,
        Name = p.Name,
        Surname = p.Surname,
        ....
    })
    .ToList();
}

• Generate dynamic proxy for interface
• UseDestinationValue
• Null propagating for property path
• Support multiple sources
• New plugins
  • Async support
  • Inject service to mapping
  • EF Core support

Mapster was designed to be efficient on both speed and memory. You could gain 5x faster while using only 1/3 of memory. And you could gain to 12x faster with

• Roslyn Compiler
• FEC
• Mapster CodeGen

Step-into debugging lets you debug your mapping and inspect values as same as its your code.

Mapster CodeGen lets you do mapping with

• Validate mapping at compile time
• Getting raw performance
• Seeing your mapping code & debugging
• Finding usage of your models' properties

https://github.com/MapsterMapper/Mapster/releases

https://github.com/MapsterMapper/Mapster/wiki

JetBrains kindly provides Mapster with a free open-source licence for their Resharper and Rider.

• Resharper makes Visual Studio a much better IDE
• Rider is fast & powerful cross platform .NET IDE