On Running My Asp.Net Project I Got A Error And I Am Not Able To Solve It

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
namespace Ecommersee.DataLayer
{

    public class DataAccess
    {
        public static string ConnectionString
        {
            get
            {
                return ConfigurationManager.ConnectionStrings["MyConn"].ConnectionString.ToString();
            }
        }
        public static SqlParameter AddParameter(string parameterName, object value, SqlDbType DbType, int size)
        {
            SqlParameter param = new SqlParameter();
            param.ParameterName = parameterName;
            param.Value = value.ToString();
            param.SqlDbType = DbType;
            param.Size = size;
            param.Direction = ParameterDirection.Input;
            return param;
        }
        public static DataTable ExecuteDTByProcedure(string Name, SqlParameter[] Params)
        {
           SqlConnection conn = new SqlConnection(ConnectionString);
           SqlCommand cmd = new SqlCommand();
           cmd.Connection = conn;
           cmd.CommandText = Name;
           cmd.Parameters.AddRange(Params);
           cmd.CommandType = CommandType.StoredProcedure;
           SqlDataAdapter adopter = new SqlDataAdapter(cmd);
           DataTable dTable = new DataTable();
        try
        { 
        adopter.Fill(dTable);
        }
        catch(Exception ex)
            {
          }
    finally
    {
            adopter.Dispose();
            cmd.Parameters.Clear();
            cmd.Dispose();
            conn.Dispose();
}
    return dTable;
    }
    }
}