Fix performance issues

BepInEx.Common/Utility.cs

@@ -15,12 +15,12 @@ namespace BepInEx.Common
         /// <summary>
         /// The directory that the game .exe is being run from.
         /// </summary>
-        public static string ExecutingDirectory => Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
+        public static string ExecutingDirectory { get; } = Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
 
         /// <summary>
         /// The path that the plugins folder is located.
         /// </summary>
-        public static string PluginsDirectory => Path.Combine(ExecutingDirectory, "BepInEx");
+        public static string PluginsDirectory { get; } = Path.Combine(ExecutingDirectory, "BepInEx");
 
         /// <summary>
         /// Combines multiple paths together, as the specfic method is not availble in .NET 3.5.