Added support for *.url files, closes #205 .

.editorconfig

@@ -100,6 +100,7 @@ csharp_style_expression_bodied_methods = true:suggestion
 csharp_style_expression_bodied_operators = true:suggestion
 csharp_style_expression_bodied_properties = true:suggestion
 csharp_style_inlined_variable_declaration = true:suggestion
+csharp_style_namespace_declarations = block_scoped:warning
 csharp_style_pattern_local_over_anonymous_function = true:suggestion
 csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
 csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion

dnSpy/dnSpy/Documents/TreeView/DocumentTreeView.cs

@@ -743,6 +743,7 @@ sealed class AddDocumentInfo {
 			filenames = GetFiles(filenames);
 
 			ResolveWindowsShortcutFiles(filenames);
+			ResolveInternetShortcutFiles(filenames);
 
 			var origFilenames = filenames;
 			var documents = DocumentService.GetDocuments();
@@ -844,6 +845,22 @@ sealed class AddDocumentInfo {
 			}
 		}
 
+		static void ResolveInternetShortcutFiles(string[] filenames) {
+			for (var i = 0; i < filenames.Length; i++) {
+				var filename = filenames[i];
+				if (!filename.EndsWith(".url", StringComparison.OrdinalIgnoreCase))
+					continue;
+				if (!File.Exists(filename))
+					continue;
+				var urlString = InternetShortcutFileFormat.GetUrlFromInternetShortcutFile(filename);
+				if (!Uri.TryCreate(urlString, UriKind.Absolute, out var urlUri))
+					continue;
+				if (!urlUri.IsFile)
+					continue;
+				filenames[i] = urlUri.AbsolutePath;
+			}
+		}
+
 		static string[] GetFiles(string[] filenames) {
 			var result = new List<string>(filenames.Length);
 			foreach (var filename in filenames) {

dnSpy/dnSpy/Documents/TreeView/InternetShortcutFileFormat.cs

@@ -0,0 +1,34 @@
+/*
+    Copyright (C) 2023 ElektroKill
+
+    This file is part of dnSpy
+
+    dnSpy is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    dnSpy is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with dnSpy.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+using System.Runtime.InteropServices;
+using System.Text;
+
+namespace dnSpy.Documents.TreeView {
+	static class InternetShortcutFileFormat {
+		internal static string? GetUrlFromInternetShortcutFile(string filename) {
+			var urlValue = new StringBuilder(255);
+			int charsCopied = GetPrivateProfileString("InternetShortcut", "URL", "", urlValue, 255, filename);
+			return charsCopied < 1 ? null : urlValue.ToString();
+		}
+
+		[DllImport("kernel32", CharSet = CharSet.Unicode)]
+		static extern int GetPrivateProfileString(string lpAppName, string lpKeyName, string lpDefault, StringBuilder lpReturnedString, int nSize, string lpFileName);
+	}
+}