How to Serialized/Convert datatable/dataset to json c# javascriptserializer

//////////////////// Convert datatable to json

////// Using Namespace

using System.Web.Script.Serialization;

Steps: Application Root >> Right click >> Add >> Reference 

>> Framework >> System.web.Extensions

public static string DataTable_JSON(DataTable dataTable)

        {

            JavaScriptSerializer serializer = new JavaScriptSerializer();

            List<Dictionary<string, object>> tableRows = new List<Dictionary<string, object>>();

            Dictionary<string, object> row;

            foreach (DataRow dr in dataTable.Rows)

            {

                row = new Dictionary<string, object>();

                foreach (DataColumn col in dataTable.Columns)

                {

                    row.Add(col.ColumnName, dr[col]);

                }

                tableRows.Add(row);

            }

            return serializer.Serialize(tableRows);

        }

///////////////// Dataset to Json

public static string DataSet_JSON(DataSet ds)

        {

            JavaScriptSerializer serializer = new JavaScriptSerializer();

            ///////// If add json without root name of the json

            //  System.Collections.ArrayList root = new System.Collections.ArrayList();

            Dictionary<string, object> _clientDictionary = new Dictionary<string, object>();

            List<Dictionary<string, object>> table;

            Dictionary<string, object> data;

           

            

            foreach (DataTable dt in ds.Tables)

            {

                table = new List<Dictionary<string, object>>();

               

                foreach (DataRow dr in dt.Rows)

                {

                    data = new Dictionary<string, object>();

                    foreach (DataColumn col in dt.Columns)

                    {

                        data.Add(col.ColumnName, dr[col]);

                    }

                    table.Add(data);

                }

                _clientDictionary.Add(dt.TableName, table);

                ///////// If add json without root name of the json

                //root.Add(table);

            }

            return serializer.Serialize(_clientDictionary);

        }