The type 'System.Data.SqlClient.SqlParameterCollection' has no constructors defined คืออะไรครับ

SqlCommand command= new SqlCommand(commandString, connection)
command.Paramters // <-- เจ้า Paramters เติม s นี่แหละคือ SqlParameterCollection

SqlParameter parameter1 = new SqlParameter();
parameter1.ParameterName = "@ID";
parameter1.Value = 17;
parameter1.SqlDbType = SqlDbType.Int;

SqlCommand command= new SqlCommand(commandString, connection)
command.Paramters.Add(parameter1);

SqlCommand command= new SqlCommand(commandString, connection)
command.Paramters.AddWithValue("@ID", 17); // <-- แบบนี้ recomment จาก framework 4

       StringBuilder strSql = new StringBuilder();
       strSql.AppendLine("SELECT * FROM Employees where EmployeeId = @EmpId ");
       SqlParameterCollection Param = new SqlParameterCollection();
       Param.Add("@EmpID", SqlDbType.Int).Value = 1;
       
        DataSet Employee = MsSqlDatabase.GetData(strSql.ToString(), "Employee", connectionString,Param);
        GridView1.DataSource = Employee;
        GridView1.DataBind();

    public static DataSet GetData(string strCommandText, string strTableName, string strConnectionString, SqlParameterCollection ParameterCollection)
    {
        DataSet ds = new DataSet();
        SqlDataAdapter da = new SqlDataAdapter(strCommandText, strConnectionString);

        foreach (SqlParameter param in ParameterCollection)
        {
            da.SelectCommand.Parameters.Add(param.ParameterName, param.SqlDbType).Value = param.Value;
        }

        try
        {
            da.Fill(ds, strTableName);
        }
        catch (Exception ex)
        {

        }
        return ds;
    }

    public struct ExecuteReturn
    {
        public int intRowEffected;
      

using System.Data;
using System.Data.SqlClient;

string sqlConnectionString = "your connection string";
SqlConnection sqlConnection = new SqlConnection(sqlConnectionString);

string sqlCommandString = "SELECT * FROM [Employees] WHERE [EmployeeId]=@EmpId";
SqlCommand sqlCommand = new SqlCommand(sqlCommandString, sqlConnection);
sqlCommand.Parameters.AddWithValue("@EmpId", 1);

SqlDataAdapter dataAdapter = new SqlDataAdapter(sqlCommand);
DataSet Ds = new DataSet();
dataAdapter.Fill(Ds, "TableName");

GridView1.DataSource = Ds;
GridView1.DataBind();

string sql = "SELECT performRating,goalRating FROM Rating_Mstr " +
            " WHERE userId=@userId AND yy=@yy ";
        SqlParameterCollection param = new SqlCommand().Parameters; //พระเอกตัวจริง
        param.AddWithValue("userId", SqlDbType.VarChar).Value = (string)Request.QueryString["empId"];
        param.AddWithValue("yy", SqlDbType.VarChar).Value = GetYear();
        DataSet dsScore = new DbClass().GetDataByParam(sql, "tblScore", param);

public DataSet GetDataByParam(string sql, string tblName,SqlParameterCollection parameters)
    {
        SqlConnection conn = new ConnectDB().connection();
        SqlDataAdapter da = new SqlDataAdapter(sql, conn);
        DataSet ds = new DataSet();
        foreach (SqlParameter param in parameters)
        {
            da.SelectCommand.Parameters.AddWithValue(param.ParameterName, param.SqlDbType).Value = param.Value;
        }
        da.Fill(ds, tblName);
        return ds;
    }