create NResUI

NResUI/Utils.cs

@@ -0,0 +1,64 @@
+using System.Reflection;
+
+namespace NResUI
+{
+    public static class Utils
+    {
+        public static bool IsDirectory(this FileSystemInfo info)
+        {
+            // get the file attributes for file or directory
+            FileAttributes attr = info.Attributes;
+
+            //detect whether its a directory or file
+            if ((attr & FileAttributes.Directory) == FileAttributes.Directory)
+                return true;
+            else
+                return false;
+        }
+
+        public static bool IsDirectoryPath(this string path)
+        {
+            return Directory.Exists(path);
+        }
+
+        public static void ClearContent(this DirectoryInfo directoryInfo)
+        {
+            foreach (var directory in directoryInfo.EnumerateDirectories())
+            {
+                directory.Delete(true);
+            }
+
+            foreach (var file in directoryInfo.EnumerateFiles())
+            {
+                file.Delete();
+            }
+        }
+
+        public static IEnumerable<Type> GetAssignableTypesFromAssembly<T>(Assembly assembly)
+        {
+            return assembly.ExportedTypes
+                .Where(t => t.IsAssignableTo(typeof(T)) && t is {IsAbstract: false, IsInterface: false});
+        }
+
+        public static IList<Type> GetAssignableTypes<T>()
+        {
+            var executingAssembly = Assembly.GetExecutingAssembly();
+            var referencedAssemblyNames = executingAssembly.GetReferencedAssemblies();
+            var types = referencedAssemblyNames.SelectMany(
+                    name =>
+                        GetAssignableTypesFromAssembly<T>(Assembly.Load(name))
+                )
+                .Concat(
+                    GetAssignableTypesFromAssembly<T>(executingAssembly)
+                )
+                .ToList();
+
+            return types;
+        }
+
+        public static bool IsNullOrEmpty(this string? str)
+        {
+            return string.IsNullOrEmpty(str);
+        }
+    }
+}