first commit

MyNewProjectName.Application/Mappings/IMapFrom.cs

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+using AutoMapper;
+
+namespace MyNewProjectName.Application.Mappings;
+
+/// <summary>
+/// Interface for auto mapping registration
+/// </summary>
+public interface IMapFrom<T>
+{
+    void Mapping(Profile profile) => profile.CreateMap(typeof(T), GetType());
+}

MyNewProjectName.Application/Mappings/MappingProfile.cs

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+using System.Reflection;
+using AutoMapper;
+
+namespace MyNewProjectName.Application.Mappings;
+
+/// <summary>
+/// AutoMapper profile that auto-registers mappings from IMapFrom interface
+/// </summary>
+public class MappingProfile : Profile
+{
+    public MappingProfile()
+    {
+        ApplyMappingsFromAssembly(Assembly.GetExecutingAssembly());
+    }
+
+    private void ApplyMappingsFromAssembly(Assembly assembly)
+    {
+        var mapFromType = typeof(IMapFrom<>);
+
+        var mappingMethodName = nameof(IMapFrom<object>.Mapping);
+
+        bool HasInterface(Type t) => t.IsGenericType && t.GetGenericTypeDefinition() == mapFromType;
+
+        var types = assembly.GetExportedTypes()
+            .Where(t => t.GetInterfaces().Any(HasInterface))
+            .ToList();
+
+        var argumentTypes = new Type[] { typeof(Profile) };
+
+        foreach (var type in types)
+        {
+            var instance = Activator.CreateInstance(type);
+
+            var methodInfo = type.GetMethod(mappingMethodName);
+
+            if (methodInfo != null)
+            {
+                methodInfo.Invoke(instance, new object[] { this });
+            }
+            else
+            {
+                var interfaces = type.GetInterfaces().Where(HasInterface).ToList();
+
+                if (interfaces.Count > 0)
+                {
+                    foreach (var @interface in interfaces)
+                    {
+                        var interfaceMethodInfo = @interface.GetMethod(mappingMethodName, argumentTypes);
+                        interfaceMethodInfo?.Invoke(instance, new object[] { this });
+                    }
+                }
+            }
+        }
+    }
+}