Update src/EventStore.Client/EventStoreClientSettings.ConnectionStrin…

…g.cs

Co-authored-by: Hayley Campbell <hayleyjeancampbell@gmail.com>

src/EventStore.Client/EventStoreClientSettings.ConnectionString.cs

@@ -65,7 +65,7 @@ public static EventStoreClientSettings Parse(string connectionString) {
 				var questionMarkIndex = connectionString.IndexOf(QuestionMark, currentIndex, StringComparison.Ordinal);
 				if ((questionMarkIndex == -1 && slashIndex != connectionString.Length - Slash.Length)
 				    || (questionMarkIndex != -1 && questionMarkIndex != currentIndex))
-					throw new ConnectionStringParseException($"The connection string may contain only a question mark (?) after specifying the hosts and a forward slash (/) but the following character was found: '{connectionString[currentIndex]}'");
+					throw new ConnectionStringParseException($"The connection string must contain a question mark (?) following the hosts if more arguments are specified. The following character was found instead: '{connectionString[currentIndex]}'");
 
 				var options = new Dictionary<string, string>();
 				if (questionMarkIndex != -1) {