Return KVFile from read header

Author: xPaw

ValveKeyValue/ValveKeyValue/Deserialization/KeyValues3/KV3TextReader.cs

@@ -28,7 +28,7 @@ public void ReadObject()
         {
             Require.NotDisposed(nameof(KV3TextReader), disposed);
 
-            tokenReader.ReadHeader();
+            var file = tokenReader.ReadHeader();
 
             while (stateMachine.IsInObject)
             {

ValveKeyValue/ValveKeyValue/Deserialization/KeyValues3/KV3TokenReader.cs

@@ -139,7 +139,7 @@ KVToken ReadBinaryBlob()
             return new KVToken(KVTokenType.BinaryBlob, sb.ToString());
         }
 
-        public KVToken ReadHeader()
+        public KVFile ReadHeader()
         {
             var str = ReadToken();
 
@@ -222,7 +222,11 @@ public KVToken ReadHeader()
                 throw new InvalidDataException($"Unrecognized encoding specifier, expected '{Format.Generic}' but got '{format}'.");
             }
 
-            return new KVToken(KVTokenType.Header, string.Empty);
+            return new KVFile
+            {
+                Encoding = encoding,
+                Format = format,
+            };
         }
 
         KVToken ReadComment()

ValveKeyValue/ValveKeyValue/KVFile.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace ValveKeyValue
+{
+    public class KVFile
+    {
+        public Guid Encoding { get; set; }
+        public Guid Format { get; set; }
+        public KVObject Root { get; set; }
+    }
+}