Rename solution directory to Elwig

Elwig/Helpers/TempFile.cs

@@ -0,0 +1,45 @@
+using System;
+using System.IO;
+
+namespace Elwig.Helpers {
+    public sealed class TempFile : IDisposable {
+        private int Usages = 0;
+        public string FilePath { get; private set; }
+
+        public TempFile() : this(null) { }
+
+        public TempFile(string? ext) : this(Path.Combine(Path.GetTempPath(), "Elwig"), ext) { }
+
+        public TempFile(string dir, string? ext) {
+            FilePath = Path.Combine(dir, Path.GetRandomFileName().Replace(".", "") + (ext != null ? $".{ext}" : ""));
+            Usages++;
+            Create();
+        }
+
+        ~TempFile() {
+            Delete();
+        }
+
+        public void Dispose() {
+            if (--Usages == 0) {
+                Delete();
+                GC.SuppressFinalize(this);
+            }
+        }
+
+        public TempFile NewReference() {
+            Usages++;
+            return this;
+        }
+
+        private void Create() {
+            using (File.Create(FilePath)) { };
+        }
+
+        private void Delete() {
+            if (FilePath == null) return;
+            File.Delete(FilePath);
+            FilePath = null;
+        }
+    }
+}