Playing around with expressions - Create a copy function

test-expression-memberinit.cs

private Func<object, object> CreateInitFn(object obj)
{
    var keyType = obj.GetType();
    if (_initFn.ContainsKey(keyType))
    {
        return _initFn[keyType];
    }
 
    ParameterExpression xTmp = Expression.Variable(obj.GetType(), "tmp");
 
    List<MemberBinding> memberBindings = new List<MemberBinding>();
    foreach (var p in obj.GetType().GetProperties())
    {
        var binding = Expression.Bind(p, Expression.MakeMemberAccess(xTmp, p));
        memberBindings.Add(binding);
    }
 
    var memberInit = Expression.MemberInit(Expression.New(obj.GetType()), memberBindings);
    var lambda = Expression.Lambda<Func<object, object>>(memberInit, xTmp);
 
    _initFn.Add(keyType, lambda.Compile());
    return _initFn[keyType];
}