Make StringHelper.GenerateSuffix internal

src/NHibernate.Test/Async/NHSpecificTest/NH2898/BinaryFormatterCache.cs

@@ -23,6 +23,31 @@ namespace NHibernate.Test.NHSpecificTest.NH2898
 	public partial class BinaryFormatterCache : CacheBase
 	{
 
+		public override Task<object> GetAsync(object key, CancellationToken cancellationToken)
+		{
+			try
+			{
+				var entry = _hashtable[key] as byte[];
+				if (entry == null)
+					return Task.FromResult<object>(null);
+
+				var fmt = new BinaryFormatter
+				{
+#if !NETFX
+					SurrogateSelector = new SerializationHelper.SurrogateSelector()	
+#endif
+				};
+				using (var stream = new MemoryStream(entry))
+				{
+					return Task.FromResult<object>(fmt.Deserialize(stream));
+				}
+			}
+			catch (System.Exception ex)
+			{
+				return Task.FromException<object>(ex);
+			}
+		}
+
 		public override Task PutAsync(object key, object value, CancellationToken cancellationToken)
 		{
 			try

src/NHibernate/Util/StringHelper.cs

@@ -872,7 +872,7 @@ public static bool IsAnyNewLine(this string str, int index, out int newLineLengt
 			return false;
 		}
 
-		public static string GenerateSuffix(int index)
+		internal static string GenerateSuffix(int index)
 		{
 			return index switch
 			{