将数据库读出来的数据转化成集合

public class DynamicBuilder<T>
    {
        private PropertyInfo[] properties;

        private DynamicBuilder() { }

        public T Build(IDataRecord reader)
        {
            T result = (T)Activator.CreateInstance(typeof(T));

            for (int i = 0; i < reader.FieldCount; i++)
            {
                if (properties[i] != null && !reader.IsDBNull(i))
                {
                    if (properties[i].PropertyType.IsEnum)
                    {
                        properties[i].SetValue(result, Enum.ToObject(properties[i].PropertyType, reader[i]), null);
                    }
                    else
                    {
                        properties[i].SetValue(result, Convert.ChangeType(reader[i], properties[i].PropertyType), null);
                    }

                }
            }
            return result;
        }

        public static DynamicBuilder<T> CreateBuilder(IDataRecord reader)
        {
            DynamicBuilder<T> result = new DynamicBuilder<T>();
            result.properties = new PropertyInfo[reader.FieldCount];
            for (int i = 0; i < reader.FieldCount; i++)
            {
                result.properties[i] = typeof(T).GetProperty(reader.GetName(i), BindingFlags.Public | BindingFlags.Instance | BindingFlags.IgnoreCase);
            }
            return result;
        }
    }