如何运用Reflection转化DynamicObject和Generic集合为DataTable

正在做的项目里面有需要把DAL 产生的Poco Collection转为DataTable然后交给别的模块处理报表

想了一下 写个支持Generic的方法吧， 不过不知道如何判断 T是否是DynamicObject的类型

于是取了第一个item，用它来判断一下，这样写肯定不是最好的，把code贴上抛砖引玉。

public static DataTable ToDataTable<T>(IEnumerable<T> input, string tableName)
        {
            var dt = new DataTable();
            dt.TableName = tableName;

            var first = Enumerable.First(input);

            if (first is System.Dynamic.DynamicObject)
            {
                IDictionary<string, object> properties = (IDictionary<string, object>)first;

                foreach (var p in properties)
                {
                    var type = p.Value.GetType();
                    if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
                        type = type.GetGenericArguments()[0];

                    dt.Columns.Add(p.Key, type);
                }

                foreach (T r in input)
                {
                    var values = new object[properties.Count];
                    int i = 0;
                    foreach (var p in properties)
                    {
                        values[i] = (r as IDictionary<string, object>)[p.Key];
                        i++;
                    }

                    dt.LoadDataRow(values, true);
                }
            }

            else
            {
                var properties = typeof(T).GetProperties();

                foreach (var p in properties)
                {
                    var type = p.PropertyType;
                    if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable<>))
                        type = type.GetGenericArguments()[0];

                    dt.Columns.Add(p.Name, type);
                }

                foreach (T r in input)
                {
                    var values = new object[properties.Length];
                    int i = 0;
                    foreach (var p in properties)
                    {
                        values[i] = p.GetValue(r, null);
                        i++;
                    }

                    dt.LoadDataRow(values, true);
                }
            }
            return dt;
        }