From c1e660487648c623e130e22ec53fce7dde9ce472 Mon Sep 17 00:00:00 2001
From: JustArchi <JustArchi@JustArchi.net>
Date: Thu, 16 Nov 2017 22:30:34 +0100
Subject: [PATCH] Code cleanup

---
 ArchiSteamFarm/Bot.cs       |  3 ++-
 ArchiSteamFarm/Utilities.cs | 23 -----------------------
 2 files changed, 2 insertions(+), 24 deletions(-)

diff --git a/ArchiSteamFarm/Bot.cs b/ArchiSteamFarm/Bot.cs
index f0feb21ce..a34289a58 100755
--- a/ArchiSteamFarm/Bot.cs
+++ b/ArchiSteamFarm/Bot.cs
@@ -25,6 +25,7 @@
 using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
@@ -1806,7 +1807,7 @@ namespace ArchiSteamFarm {
 
 			if (OwnedPackageIDs.Count > 0) {
 				if (!BotConfig.IdleRefundableGames || (BotConfig.FarmingOrder == BotConfig.EFarmingOrder.RedeemDateTimesAscending) || (BotConfig.FarmingOrder == BotConfig.EFarmingOrder.RedeemDateTimesDescending)) {
-					Program.GlobalDatabase.RefreshPackageIDs(this, OwnedPackageIDs.Keys.AsReadOnlyCollection()).Forget();
+					Program.GlobalDatabase.RefreshPackageIDs(this, OwnedPackageIDs.Keys.ToImmutableHashSet()).Forget();
 				}
 			}
 
diff --git a/ArchiSteamFarm/Utilities.cs b/ArchiSteamFarm/Utilities.cs
index 554047b00..d3057b8a9 100644
--- a/ArchiSteamFarm/Utilities.cs
+++ b/ArchiSteamFarm/Utilities.cs
@@ -23,7 +23,6 @@
 */
 
 using System;
-using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Globalization;
@@ -39,16 +38,6 @@ namespace ArchiSteamFarm {
 	internal static class Utilities {
 		private static readonly Random Random = new Random();
 
-		internal static IReadOnlyCollection<T> AsReadOnlyCollection<T>(this ICollection<T> source) {
-			if (source == null) {
-				ASF.ArchiLogger.LogNullError(nameof(source));
-				return null;
-			}
-
-			IReadOnlyCollection<T> result = source as IReadOnlyCollection<T> ?? new ReadOnlyCollectionAdapter<T>(source);
-			return result;
-		}
-
 		[SuppressMessage("ReSharper", "UnusedParameter.Global")]
 		[MethodImpl(MethodImplOptions.AggressiveInlining)]
 		internal static void Forget(this object obj) { }
@@ -184,17 +173,5 @@ namespace ArchiSteamFarm {
 
 			return result;
 		}
-
-		private sealed class ReadOnlyCollectionAdapter<T> : IReadOnlyCollection<T> {
-			public int Count => Source.Count;
-
-			private readonly ICollection<T> Source;
-
-			internal ReadOnlyCollectionAdapter(ICollection<T> source) => Source = source ?? throw new ArgumentNullException(nameof(source));
-
-			public IEnumerator<T> GetEnumerator() => Source.GetEnumerator();
-
-			IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
-		}
 	}
 }
\ No newline at end of file