将List<T>数组中的数据转换成Json 格式的数据

 #region 将获得的安装软件信息格式转换成Json 格式
        public static string JSON<InstallSoftDataEnitity>(List<InstallSoftDataEnitity> installSoftsData)
        { 
            System.Text.StringBuilder st = new System.Text.StringBuilder(); 
            try 
            {
                System.Runtime.Serialization.Json.DataContractJsonSerializer s = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(InstallSoftDataEnitity));
                foreach (object city in installSoftsData)
                {

                    MemoryStream ms = new MemoryStream();

                    {
                        s.WriteObject(ms, city);
                        st.Append(System.Text.Encoding.UTF8.GetString(ms.ToArray()));
                    }
                }
            } 
            catch (Exception ex) 
            { 
                throw ex;
            }
            return st.ToString();
        }
        #endregion 将获得的安装软件信息格式转换成Json 格式