C#

public static bool ExecuteSQLQuery(NpgsqlCommand cmdText, out DataTable dataTable)
        {
            try
            {
                string connectionString = ConfigurationManager.AppSettings["connectionString"];

                NpgsqlConnection sqlConnection = new NpgsqlConnection(connectionString);
                sqlConnection.Open();

                cmdText.Connection = sqlConnection;

                dataTable = new DataTable();
                dataTable.Load(cmdText.ExecuteReader(CommandBehavior.CloseConnection));

                sqlConnection.Close();

                return true;
            }
            catch(Exception ex)
            { dataTable = new DataTable();  return false; }
        }

DataTable dataTable = new DataTable();
            NpgsqlCommand sqlCommand = new NpgsqlCommand("SELECT * FROM users.users WHERE (email ilike @email or username ilike @username)");
            sqlCommand.Parameters.AddWithValue("email", NpgsqlTypes.NpgsqlDbType.Varchar, email);
            sqlCommand.Parameters.AddWithValue("username", NpgsqlTypes.NpgsqlDbType.Varchar, username);

DatabaseConnectivity.ExecuteSQLQuery(sqlCommand, out dataTable)

public static bool ExecuteSQLNonQuery(NpgsqlCommand cmdText)
        {
            try
            {
                string connectionString = ConfigurationManager.AppSettings["connectionString"];

                NpgsqlConnection sqlConnection = new NpgsqlConnection(connectionString);
                sqlConnection.Open();

                cmdText.Connection = sqlConnection;
                cmdText.ExecuteNonQuery();

                sqlConnection.Close();

                return true;
            }
            catch (Exception ex)
            { return false; }
        }

Data Source=DBServer;Network Library=DBMSSOCN;Initial Catalog=DBName; User ID=DBUserName; Password=DBPassword; POOLING=false;Trusted_Connection=false;APPLICATION NAME = STATECHANGE_ISSUE

    void BtncopyClick(object sender, EventArgs e)
    {
        string filename=@"E:\\Files\\Reports\\R^ECG^_0_1688^Jones^^_20160711065157_20160711065303 - Copy (4) - Copy.pdf";
        string sourcepath=@"E:\\Anusha";
        string targetpath=@"E:\\Anusha\\aaa";

        string sourcefile= System.IO.Path.Combine(sourcepath,filename);
        string destfile= System.IO.Path.Combine(targetpath,filename);
        if (!System.IO.Directory.Exists(targetpath))
        {
        System.IO.Directory.CreateDirectory(targetpath);
        }
      System.IO.File.Copy(sourcefile, destfile, true);
        if (System.IO.Directory.Exists(sourcepath))
    {
        string[] files = System.IO.Directory.GetFiles(sourcepath);

        // Copy the files and overwrite destination files if they already exist.
        foreach (string s in files)
        {
            // Use static Path methods to extract only the file name from the path.
            filename = System.IO.Path.GetFileName(s);
            destfile = System.IO.Path.Combine(targetpath, filename);
            System.IO.File.Copy(s, destfile, true);
        }
    }
    else
    {
        MessageBox.Show("File doesn't exist");
    }
}
    void BtnmoveClick(object sender, EventArgs e)
    {
        String path = "E:\\Files\\25-11-2017";
        String path2 = "E:\\Anusha\\aaa\\25-11-2017";

    if (!File.Exists(path))
    {
        {
            // This statement ensures that the file is created,
            // but the handle is not kept.
            using (FileStream fs = File.Create(path)) {}
        }

        System.IO.Directory.Move("E:\\Files\\25-11-2017",@"E://Anusha//aaa");

        // Move the file.
        File.Move(path, path2);
        MessageBox.Show("File Moved");
        }
 }

i HAVE WRITTEN BELOW code to copy and move the folder ,I am not getting any compiling errors but while i am trying to click on button on output form it was showing as termination.