//2. Complex timer tick event method - It is suitable extract foreach cycles in this methods to the separate methods?

        private void DispatcherTimerForPing_Tick(object sender, EventArgs eventArgs)
...

//Constructors has many arguments

        [ImportingConstructor]
...

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            string colName = parameter.ToString();
...

using System;
    using System.Linq;
    using System.Collections.Generic;
...