Get process name from pid or handle

You can use Process.GetProcessById to get Process. Process has a lot of information about the running program. Process.ProcessName gives you the name, Process.MainModule.FileName gives you the name of the executable file.

Process.GetProcessById(id).ProcessName

// Here is a neat little method to return the task manager memory. If the process id doesn't exist, it will throw an exception and return 0 for the memory

    /// <summary>    /// Gets the process memory.    /// </summary>    /// <param name="processId">The process identifier.</param>    /// <returns></returns>    /// <para> </para>    /// <para> </para>    /// <exception cref="ArgumentException"> </exception>    /// <exception cref="ArgumentNullException"> </exception>    /// <exception cref="ComponentModel.Win32Exception"> </exception>    /// <exception cref="InvalidOperationException"> </exception>    /// <exception cref="PlatformNotSupportedException"> </exception>    /// <exception cref="UnauthorizedAccessException"> </exception>    public static long GetProcessMemory(int processId)    {        try        {            var instanceName = Process.GetProcessById(processId).ProcessName;            using (var performanceCounter = new PerformanceCounter("Process", "Working Set - Private", instanceName))            {                return performanceCounter.RawValue / Convert.ToInt64(1024);            }        }        catch (Exception)        {            return 0;        }    }