diff --git a/Source/Libs/Shared/GLibrary.cs b/Source/Libs/Shared/GLibrary.cs
index 62f810f55..58c5c2ffe 100644
--- a/Source/Libs/Shared/GLibrary.cs
+++ b/Source/Libs/Shared/GLibrary.cs
@@ -5,77 +5,93 @@ using System.Runtime.InteropServices;
 
 class GLibrary
 {
-    [DllImport("kernel32.dll", SetLastError = true)]
-    private static extern bool SetDllDirectory(string lpPathName);
 
-    private static Dictionary<Library, IntPtr> _libraries;
-    private static Dictionary<string, IntPtr> _customlibraries;
-    private static Dictionary <Library, string[]> _libraryDefinitions;
+	[DllImport("kernel32.dll", SetLastError = true)]
+	private static extern bool SetDllDirectory(string lpPathName);
 
-    static GLibrary()
-    {
-        _customlibraries = new Dictionary<string, IntPtr>();
-        _libraries = new Dictionary<Library, IntPtr>();
-        _libraryDefinitions = new Dictionary<Library, string[]>();
-        _libraryDefinitions[Library.GLib] = new[] { "libglib-2.0-0.dll", "libglib-2.0.so.0", "libglib-2.0.0.dylib", "glib-2.dll" };
-        _libraryDefinitions[Library.GObject] = new[] { "libgobject-2.0-0.dll", "libgobject-2.0.so.0", "libgobject-2.0.0.dylib", "gobject-2.dll" };
-        _libraryDefinitions[Library.Cairo] = new[] { "libcairo-2.dll", "libcairo.so.2", "libcairo.2.dylib", "cairo.dll" };
-        _libraryDefinitions[Library.Gio] = new[] { "libgio-2.0-0.dll", "libgio-2.0.so.0", "libgio-2.0.0.dylib", "gio-2.dll" };
-        _libraryDefinitions[Library.Atk] = new[] { "libatk-1.0-0.dll", "libatk-1.0.so.0", "libatk-1.0.0.dylib", "atk-1.dll" };
-        _libraryDefinitions[Library.Pango] = new[] { "libpango-1.0-0.dll", "libpango-1.0.so.0", "libpango-1.0.0.dylib", "pango-1.dll" };
-        _libraryDefinitions[Library.Gdk] = new[] { "libgdk-3-0.dll", "libgdk-3.so.0", "libgdk-3.0.dylib", "gdk-3.dll" };
-        _libraryDefinitions[Library.GdkPixbuf] = new[] { "libgdk_pixbuf-2.0-0.dll", "libgdk_pixbuf-2.0.so.0", "libgdk_pixbuf-2.0.dylib", "gdk_pixbuf-2.dll" };
-        _libraryDefinitions[Library.Gtk] = new[] { "libgtk-3-0.dll", "libgtk-3.so.0", "libgtk-3.0.dylib", "gtk-3.dll" };
-        _libraryDefinitions[Library.PangoCairo] = new[] { "libpangocairo-1.0-0.dll", "libpangocairo-1.0.so.0", "libpangocairo-1.0.0.dylib", "pangocairo-1.dll" };
-        _libraryDefinitions[Library.GtkSource] = new[] { "libgtksourceview-4-0.dll", "libgtksourceview-4.so.0", "libgtksourceview-4.0.dylib", "gtksourceview-4.dll" };
-    }
+	private static Dictionary<Library, IntPtr> _libraries;
+	private static HashSet<Library> _librariesNotFound;
+	private static Dictionary<string, IntPtr> _customlibraries;
+	private static Dictionary<Library, string[]> _libraryDefinitions;
 
-    public static IntPtr Load(Library library)
-    {
-        var ret = IntPtr.Zero;
-        if (_libraries.TryGetValue(library, out ret))
-            return ret;
+	static GLibrary()
+	{
+		_customlibraries = new Dictionary<string, IntPtr>();
+		_librariesNotFound = new HashSet<Library>();
+		_libraries = new Dictionary<Library, IntPtr>();
+		_libraryDefinitions = new Dictionary<Library, string[]>();
+		_libraryDefinitions[Library.GLib] = new[] {"libglib-2.0-0.dll", "libglib-2.0.so.0", "libglib-2.0.0.dylib", "glib-2.dll"};
+		_libraryDefinitions[Library.GObject] = new[] {"libgobject-2.0-0.dll", "libgobject-2.0.so.0", "libgobject-2.0.0.dylib", "gobject-2.dll"};
+		_libraryDefinitions[Library.Cairo] = new[] {"libcairo-2.dll", "libcairo.so.2", "libcairo.2.dylib", "cairo.dll"};
+		_libraryDefinitions[Library.Gio] = new[] {"libgio-2.0-0.dll", "libgio-2.0.so.0", "libgio-2.0.0.dylib", "gio-2.dll"};
+		_libraryDefinitions[Library.Atk] = new[] {"libatk-1.0-0.dll", "libatk-1.0.so.0", "libatk-1.0.0.dylib", "atk-1.dll"};
+		_libraryDefinitions[Library.Pango] = new[] {"libpango-1.0-0.dll", "libpango-1.0.so.0", "libpango-1.0.0.dylib", "pango-1.dll"};
+		_libraryDefinitions[Library.Gdk] = new[] {"libgdk-3-0.dll", "libgdk-3.so.0", "libgdk-3.0.dylib", "gdk-3.dll"};
+		_libraryDefinitions[Library.GdkPixbuf] = new[] {"libgdk_pixbuf-2.0-0.dll", "libgdk_pixbuf-2.0.so.0", "libgdk_pixbuf-2.0.dylib", "gdk_pixbuf-2.dll"};
+		_libraryDefinitions[Library.Gtk] = new[] {"libgtk-3-0.dll", "libgtk-3.so.0", "libgtk-3.0.dylib", "gtk-3.dll"};
+		_libraryDefinitions[Library.PangoCairo] = new[] {"libpangocairo-1.0-0.dll", "libpangocairo-1.0.so.0", "libpangocairo-1.0.0.dylib", "pangocairo-1.dll"};
+		_libraryDefinitions[Library.GtkSource] = new[] {"libgtksourceview-4-0.dll", "libgtksourceview-4.so.0", "libgtksourceview-4.0.dylib", "gtksourceview-4.dll"};
+	}
 
-        if (FuncLoader.IsWindows)
-        {
-            ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][0]);
+	public static IntPtr Load(Library library)
+	{
+		if (_libraries.TryGetValue(library, out var ret))
+			return ret;
 
-            if (ret == IntPtr.Zero)
-            {
-                SetDllDirectory(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Gtk", "3.24.24"));
-                ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][0]);
-            }
-        }
-        else if (FuncLoader.IsOSX)
-        {
-            ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][2]);
+		if (TryGet(library, out ret)) return ret;
 
-            if (ret == IntPtr.Zero)
-            {
-                ret = FuncLoader.LoadLibrary("/usr/local/lib/" + _libraryDefinitions[library][2]);
-            }
-        }
-        else
-            ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][1]);
+		var err = library + ": " + string.Join(", ", _libraryDefinitions[library]);
 
-        if (ret == IntPtr.Zero)
-        {
-            for (int i = 0; i < _libraryDefinitions[library].Length; i++)
-            {
-                ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][i]);
+		throw new DllNotFoundException(err);
 
-                if (ret != IntPtr.Zero)
-                    break;
-            }
-        }
+	}
 
-        if (ret == IntPtr.Zero)
-        {
-            var err = library + ": " + string.Join(", ", _libraryDefinitions[library]);
-            throw new DllNotFoundException(err);
-        }
+	public static bool IsSupported(Library library) => TryGet(library, out var __);
+
+	static bool TryGet(Library library, out IntPtr ret)
+	{
+		ret = IntPtr.Zero;
+
+		if (_libraries.TryGetValue(library, out ret)) {
+			return true;
+		}
+
+		if (_librariesNotFound.Contains(library)) {
+			return false;
+		}
+
+		if (FuncLoader.IsWindows) {
+			ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][0]);
+
+			if (ret == IntPtr.Zero) {
+				SetDllDirectory(Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "Gtk", "3.24.24"));
+				ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][0]);
+			}
+		} else if (FuncLoader.IsOSX) {
+			ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][2]);
+
+			if (ret == IntPtr.Zero) {
+				ret = FuncLoader.LoadLibrary("/usr/local/lib/" + _libraryDefinitions[library][2]);
+			}
+		} else
+			ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][1]);
+
+		if (ret == IntPtr.Zero) {
+			for (var i = 0; i < _libraryDefinitions[library].Length; i++) {
+				ret = FuncLoader.LoadLibrary(_libraryDefinitions[library][i]);
+
+				if (ret != IntPtr.Zero)
+					break;
+			}
+		}
+
+		if (ret != IntPtr.Zero) {
+			_libraries[library] = ret;
+		} else {
+			_librariesNotFound.Add(library);
+		}
+
+		return ret != IntPtr.Zero;
+	}
 
-        _libraries[library] = ret;
-        return ret;
-    }
 }
\ No newline at end of file