:::info Serverside Code only works when running local projects - please read that page first.
:::
When compiling a project, if we're a dedicated server, we can run code in if #SERVER blocks.
protected override void OnUpdate()
{
#if SERVER
Log.Info( $"This is a server update!" );
#else
Log.Info( $"This is a client update!" );
#endif
}
If we're running on a dedicated server, we'll get This is a server update! spamming our console.
This is especially useful for omitting potentially sensitive code from client builds, like contacting an API server, or a database.
Say you have a GameManager.cs file, which has a partial class, you can accompany it with a GameManager.Server.cs file which is safely omitted from client builds and wraps the whole file in an #if SERVER block - it's a nice bit of sugar that saves you having a bunch of preprocessor blocks in your code.
All serverside code is stripped out of published games by default - so there's no worries there.