Don't release inventoryg result in InventoryUpdated callback

Facepunch.Steamworks.Test/InventoryTest.cs

@@ -54,10 +54,13 @@ namespace Steamworks
 			var result = await SteamInventory.GetAllItemsAsync();
 
 			Assert.IsTrue( result.HasValue );
+			Assert.IsTrue( result.Value.ItemCount > 0 );
 
 			using ( result )
 			{
-				var items = result?.GetItems( true );
+				var items = result.Value.GetItems( true );
+
+				Assert.IsNotNull( items );
 
 				foreach ( var item in items )
 				{
@@ -71,6 +74,33 @@ namespace Steamworks
 			}
 		}
 
+		[TestMethod]
+		public async Task GetAllItemsMultipleTimes()
+		{
+			await SteamInventory.WaitForDefinitions();
+
+			var fresult = await SteamInventory.GetAllItemsAsync();
+
+			Assert.IsTrue( fresult.HasValue );
+			Assert.IsTrue( fresult.Value.ItemCount > 0 );
+
+			await Task.Delay( 1000 );
+
+			var result = await SteamInventory.GetAllItemsAsync();
+
+			Assert.IsTrue( result.HasValue );
+			Assert.IsTrue( result.Value.GetItems().Length == fresult.Value.ItemCount );
+
+
+			await Task.Delay( 1000 );
+
+			result = await SteamInventory.GetAllItemsAsync();
+
+			Assert.IsTrue( result.HasValue );
+			Assert.IsTrue( result.Value.ItemCount == fresult.Value.ItemCount );
+
+		}
+
 		[TestMethod]
 		public async Task Items()
 		{

Facepunch.Steamworks/SteamInventory.cs

@@ -46,8 +46,6 @@ namespace Steamworks
 			Items = r.GetItems( false );
 
 			OnInventoryUpdated?.Invoke( r );
-
-			r.Dispose();
 		}
 
 		public static event Action<InventoryResult> OnInventoryUpdated;

Facepunch.Steamworks/Structs/InventoryResult.cs

@@ -58,6 +58,8 @@ namespace Steamworks
 
 		public void Dispose()
 		{
+			if ( _id.Value == -1 ) return;
+
 			SteamInventory.Internal.DestroyResult( _id );
 		}