Reusing constant

Source commit: 20316a453494b28c7a18444e27cef1c19a3af0e3

dotnet/Session.cs

@@ -1489,7 +1489,7 @@ namespace WinSCP
                 SessionOptionsToSwitches(sessionOptions, scanFingerprint, out string arguments, out string logArguments);
 
                 const string switchName = "-rawsettings";
-                Tools.AddRawParameters(ref arguments, sessionOptions.RawSettings, "-rawsettings");
+                Tools.AddRawParameters(ref arguments, sessionOptions.RawSettings, switchName);
                 Tools.AddRawParameters(ref logArguments, sessionOptions.RawSettings, switchName);
 
                 if (!string.IsNullOrEmpty(arguments))