Update preprocessor-variables.md

en/manual/scripts/preprocessor-variables.md

@@ -34,10 +34,10 @@ If you're developing for multiple platforms, you often need to write custom code
 
 ```cs
 
-#if SILICONSTUDIO_PLATFORM_WINDOWS
+#if STRIDE_PLATFORM_WINDOWS
     // Windows-specific code goes here...
 
-#elif SILICONSTUDIO_PLATFORM_MONO_MOBILE
+#elif STRIDE_PLATFORM_MONO_MOBILE
     // iOS and Android-specific code goes here...
 
 #else
@@ -55,4 +55,4 @@ If you're developing for multiple platforms, you often need to write custom code
 * [Public properties and fields](public-properties-and-fields.md)
 * [Scheduling and priorities](scheduling-and-priorities.md)
 * [Events](events.md)
-* [Debugging](debugging.md)
+* [Debugging](debugging.md)