Update ArchiveFile.cs

support for rar5 archives.

You still need new 7z.dll:
Go to http://www.7-zip.org/download.html and get the newest x86 or x64 version and install it. Copy the "7z.dll" to the unrarit folder and rename it to "7z-amd64.dll". If you used the 32bit dll rename it to "7z-x86.dll"

UnRarIt.Archive/SevenZip/ArchiveFile.cs

@@ -30,9 +30,10 @@ public sealed class ArchiveFile : IArchiveFile, IArchiveOpenCallback, IArchiveOp
     public static readonly Guid FormatZip = new Guid("23170f69-40c1-278a-1000-000110010000");
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Rar")]
     public static readonly Guid FormatRar = new Guid("23170f69-40c1-278a-1000-000110030000");
+    public static readonly Guid FormatRar5 = new Guid("23170f69-40c1-278a-1000-000110CC0000");
     public static readonly Guid FormatSplit = new Guid("23170f69-40c1-278a-1000-000110EA0000");
     [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
-    public static readonly ReadOnlyCollection<Guid> AllFormats = new ReadOnlyCollection<Guid>(new List<Guid>() { FormatZip, FormatRar, FormatSevenZip, FormatSplit });
+    public static readonly ReadOnlyCollection<Guid> AllFormats = new ReadOnlyCollection<Guid>(new List<Guid>() { FormatZip, FormatRar, FormatRar5, FormatSevenZip, FormatSplit });
     private readonly Dictionary<string, IArchiveEntry> items = new Dictionary<string, IArchiveEntry>();
     private string currentPassword = string.Empty;
     private readonly Dictionary<string, SevenZipFileStream> fileStreams = new Dictionary<string, SevenZipFileStream>();