System.Diagnostics.NtProcessInfoHelper.GetProcessShortName C# (CSharp) Method

        internal static string GetProcessShortName(String name)
        {
            if (String.IsNullOrEmpty(name))
            {
#if FEATURE_TRACESWITCH
                Debug.WriteLineIf(Process._processTracing.TraceVerbose, "GetProcessInfos() - unexpected blank ProcessName");
#endif
                return String.Empty;
            }

            int slash = -1;
            int period = -1;

            for (int i = 0; i < name.Length; i++)
            {
                if (name[i] == '\\')
                    slash = i;
                else if (name[i] == '.')
                    period = i;
            }

            if (period == -1)
                period = name.Length - 1; // set to end of string
            else
            {
                // if a period was found, then see if the extension is
                // .EXE, if so drop it, if not, then use end of string
                // (i.e. include extension in name)
                String extension = name.Substring(period);

                if (String.Equals(".exe", extension, StringComparison.OrdinalIgnoreCase))
                    period--;                 // point to character before period
                else
                    period = name.Length - 1; // set to end of string
            }

            if (slash == -1)
                slash = 0;     // set to start of string
            else
                slash++;       // point to character next to slash

            // copy characters between period (or end of string) and
            // slash (or start of string) to make image name
            return name.Substring(slash, period - slash + 1);
        }

        /// <summary>Gets the process name for the specified process ID on the specified machine.</summary>
        /// <param name="processId">The process ID.</param>
        /// <param name="machineName">The machine name.</param>
        /// <returns>The process name for the process if it could be found; otherwise, null.</returns>
        public static string?GetProcessName(int processId, string machineName)
        {
            if (IsRemoteMachine(machineName))
            {
                // remote case: we take the hit of looping through all results
                ProcessInfo[] processInfos = NtProcessManager.GetProcessInfos(machineName, isRemoteMachine: true);
                foreach (ProcessInfo processInfo in processInfos)
                {
                    if (processInfo.ProcessId == processId)
                    {
                        return(processInfo.ProcessName);
                    }
                }
            }
            else
            {
                // local case: do not use performance counter and also attempt to get the matching (by pid) process only

                string?processName = Interop.Kernel32.GetProcessName((uint)processId);
                if (processName is not null)
                {
                    return(NtProcessInfoHelper.GetProcessShortName(processName));
                }
            }

            return(null);
        }