A lot of random changes to try and speed up SharpCompress.

API/Archive/Archive.cs

@@ -0,0 +1,41 @@
+using System;
+using System.IO;
+using System.IO.Compression;
+using SharpCompress.Archives;
+
+namespace API.Archive
+{
+    public static class Archive
+    {
+        /// <summary>
+        /// Checks if a File can be opened. Requires up to 2 opens of the filestream.
+        /// </summary>
+        /// <param name="archivePath"></param>
+        /// <returns></returns>
+        public static ArchiveLibrary CanOpen(string archivePath)
+        {
+            if (!File.Exists(archivePath) || !Parser.Parser.IsArchive(archivePath)) return ArchiveLibrary.NotSupported;
+            
+            try
+            {
+                using var a2 = ZipFile.OpenRead(archivePath);
+                return ArchiveLibrary.Default;
+                
+            }
+            catch (Exception)
+            {
+                try
+                {
+                    using var a1 = ArchiveFactory.Open(archivePath);
+                    return ArchiveLibrary.SharpCompress;
+                }
+                catch (Exception)
+                {
+                    return ArchiveLibrary.NotSupported;
+                }
+            }
+        }
+        
+        
+    }
+}