Closes #736

Note to self: check if this works on Linux/OS X too before documenting it. I might need to change it if it doesn't.

ArchiSteamFarm/IPC.cs

@@ -21,6 +21,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.IO.Compression;
@@ -172,7 +173,14 @@ internal static class IPC {
 			}
 
 			uint memoryUsage = (uint) GC.GetTotalMemory(true) / 1024;
-			ASFResponse asfResponse = new ASFResponse(memoryUsage, SharedInfo.Version);
+
+			DateTime processStartTime;
+
+			using (Process process = Process.GetCurrentProcess()) {
+				processStartTime = process.StartTime;
+			}
+
+			ASFResponse asfResponse = new ASFResponse(memoryUsage, processStartTime, SharedInfo.Version);
 
 			await ResponseJsonObject(request, response, new GenericResponse(true, "OK", asfResponse)).ConfigureAwait(false);
 			return true;
@@ -761,15 +769,19 @@ private sealed class ASFResponse {
 			[JsonProperty]
 			internal readonly uint MemoryUsage;
 
+			[JsonProperty]
+			internal readonly DateTime ProcessStartTime;
+
 			[JsonProperty]
 			internal readonly Version Version;
 
-			internal ASFResponse(uint memoryUsage, Version version) {
-				if ((memoryUsage == 0) || (version == null)) {
-					throw new ArgumentNullException(nameof(memoryUsage) + " || " + nameof(version));
+			internal ASFResponse(uint memoryUsage, DateTime processStartTime, Version version) {
+				if ((memoryUsage == 0) || (processStartTime == DateTime.MinValue) || (version == null)) {
+					throw new ArgumentNullException(nameof(memoryUsage) + " || " + nameof(processStartTime) + " || " + nameof(version));
 				}
 
 				MemoryUsage = memoryUsage;
+				ProcessStartTime = processStartTime;
 				Version = version;
 			}
 		}