Add additional file exist checks

Author: FaithBeam

.github/workflows/dotnet.yml

@@ -2,7 +2,7 @@ name: .NET
 
 env:
   PACK_ID: Sims1WidescreenPatcher
-  PACK_VER: 3.7.1
+  PACK_VER: 3.7.2
 
 on: 
   push:

Sims1WidescreenPatcher.Utilities/PatchUtility.cs

@@ -9,7 +9,7 @@ public static class PatchUtility
 
     public static bool IsValidSims(string path)
     {
-        if (string.IsNullOrWhiteSpace(path)) return false;
+        if (string.IsNullOrWhiteSpace(path) || !File.Exists(path)) return false;
         Log.Information("Begin check Sims executable is valid");
         var pattern = Pattern.Transform(BytePattern);
         var bytes = File.ReadAllBytes(path);
@@ -53,7 +53,7 @@ public static void Patch(string path, int width, int height)
 
     public static bool SimsBackupExists(string path)
     {
-        if (string.IsNullOrWhiteSpace(path)) return false;
+        if (string.IsNullOrWhiteSpace(path) || !File.Exists(path)) return false;
         Log.Information("Begin check backup exists for Sims executable");
         Log.Debug("Path {Path}", path);
         var fileName = Path.GetFileNameWithoutExtension(path);
@@ -67,7 +67,7 @@ public static bool SimsBackupExists(string path)
 
     private static void BackupSims(string path)
     {
-        if (string.IsNullOrWhiteSpace(path)) return;
+        if (string.IsNullOrWhiteSpace(path) || !File.Exists(path)) return;
         Log.Information("Begin backup of Sims executable");
         var fileName = Path.GetFileNameWithoutExtension(path);
         var dir = Path.GetDirectoryName(path) ?? string.Empty;

Sims1WidescreenPatcher.Windows/Services/FindSimsPathService.cs

@@ -15,7 +15,7 @@ public string FindSimsPath()
             var val = key?.GetValue("InstallPath")?.ToString();
             if (string.IsNullOrWhiteSpace(val)) return string.Empty;
             var path = Path.Combine(val, "Sims.exe");
-            return path;
+            return File.Exists(path) ? path : string.Empty;
         }
         catch (Exception)
         {