Move laargs.txt to more suitable location.

Core/StartupArgManager.cs

@@ -11,7 +11,7 @@ public static class StartupArgManager
         /// <summary>
         /// Path to startup arguments file.
         /// </summary>
-        private const string StartupArgsPath = "laargs.txt";
+        private static readonly string StartupArgsPath = Path.Combine(PathManager.ConfigPath, "laargs.txt");
 
         /// <summary>
         /// Merges Command-line arguments and arguments in <paramref name="cmdArgs"/>
@@ -20,6 +20,8 @@ public static class StartupArgManager
         /// <returns>Merged Arguments</returns>
         public static string[] MergeStartupArgs(IEnumerable<string> cmdArgs)
         {
+            MigrateArgsFile();
+
             List<string> startupArgs = new List<string>();
             startupArgs.AddRange(cmdArgs);
 
@@ -37,5 +39,33 @@ public static string[] MergeStartupArgs(IEnumerable<string> cmdArgs)
                 return startupArgs.ToArray();
             }
         }
+
+        private static void MigrateArgsFile()
+        {
+            const string ObsoleteFile = "laargs.txt";
+
+            try
+            {
+                if (File.Exists(ObsoleteFile) && string.IsNullOrWhiteSpace(File.ReadAllText(ObsoleteFile)))
+                {
+                    File.Delete(ObsoleteFile);
+                    ConsoleUtil.WriteLine("Obsolete configuration file 'laargs.txt' is empty and has been deleted.");
+                    return;
+                }
+
+                if (File.Exists(StartupArgsPath))
+                {
+                    ConsoleUtil.WriteLine("Unable to migrate your old 'laargs' configuration. The destination file already exists.");
+                    return;
+                }
+
+                File.Move(ObsoleteFile, StartupArgsPath);
+                ConsoleUtil.WriteLine("Successfully migrated your old 'laargs' configuration.");
+            }
+            catch (Exception ex)
+            {
+                ConsoleUtil.WriteLine($"An error occurred during migration: {ex}");
+            }
+        }
     }
 }