Move TempFile to own class

WGneu/Helpers/Utils.cs

@@ -1,12 +1,10 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Media;
 using System.Windows;
 using System.Windows.Controls;
-using System.IO;
 using System.Diagnostics;
 
 namespace WGneu.Helpers {
@@ -63,46 +61,5 @@ namespace WGneu.Helpers {
                 UseShellExecute = true,
             });
         }
-
-        public sealed class TemporaryFile : IDisposable {
-            private int Usages = 0;
-            public string FilePath { get; private set; }
-
-            public TemporaryFile() : this(null) { }
-
-            public TemporaryFile(string? ext) : this(Path.Combine(Path.GetTempPath(), "Kelwin"), ext) { }
-
-            public TemporaryFile(string dir, string? ext) {
-                FilePath = Path.Combine(dir, Path.GetRandomFileName().Replace(".", "") + (ext != null ? $".{ext}" : ""));
-                Usages++;
-                Create();
-            }
-
-            ~TemporaryFile() {
-                Delete();
-            }
-
-            public void Dispose() {
-                if (--Usages == 0) {
-                    Delete();
-                    GC.SuppressFinalize(this);
-                }
-            }
-
-            public TemporaryFile NewReference() {
-                Usages++;
-                return this;
-            }
-
-            private void Create() {
-                using (File.Create(FilePath)) { };
-            }
-
-            private void Delete() {
-                if (FilePath == null) return;
-                File.Delete(FilePath);
-                FilePath = null;
-            }
-        }
     }
 }