Deep Copy of a C# Object

Question

I am working on some code that is written in C#. In this app, I have a custom collection defined as follows:

public class ResultList : IEnumerable&l         


        

Answer 1

Expanding on @Georgi-it, I had to modify his code to handle properties whose type inherits List:

public static class ObjectCloner {
    public static T Clone(object obj, bool deep = false) where T : new() {
        if (!(obj is T)) {
            throw new Exception("Cloning object must match output type");
        }

        return (T)Clone(obj, deep);
    }

    public static object Clone(object obj, bool deep) {
        if (obj == null) {
            return null;
        }

        Type objType = obj.GetType();

        if (objType.IsPrimitive || objType == typeof(string) || objType.GetConstructors().FirstOrDefault(x => x.GetParameters().Length == 0) == null) {
            return obj;
        }

        List properties = objType.GetProperties().ToList();
        if (deep) {
            properties.AddRange(objType.GetProperties(BindingFlags.Instance | BindingFlags.NonPublic));
        }

        object newObj = Activator.CreateInstance(objType);

        foreach (var prop in properties) {
            if (prop.GetSetMethod() != null) {
                var proceed = true;
                if (obj is IList) {
                    var listType = obj.GetType().GetProperty("Item").PropertyType;
                    if (prop.PropertyType == listType) {
                        proceed = false;
                        foreach (var item in obj as IList) {
                            object clone = Clone(item, deep);
                            (newObj as IList).Add(clone);                               
                        }                           
                    }                       
                }

                if (proceed) {
                    object propValue = prop.GetValue(obj, null);
                    object clone = Clone(propValue, deep);
                    prop.SetValue(newObj, clone, null);
                }                   
            }
        }

        return newObj;
    }
}