• Powerful cross-platform C# Editor :
  • JetBrains Rider is a fast and powerful C# editor for Unity that runs on Windows, Mac, and Linux. With the unbeatable 2500+ smart code inspections and refactorings, Rider enhances your C# experience, letting you write error-proof code much faster.
• Easy start with Unity :
  • Rider has Unity support built in, and the very first time you open a Unity solution it will automatically configure Unity to use Rider as the default editor for C# scripts and shader files. Once done, double-clicking a C# script or shader asset will open the solution in Rider.

• Control Unity editor :
  • Thanks to the integrated two-way communication, you can switch into and out of Play mode, and pause and step a single frame without ever leaving Rider! The toolbar includes game view buttons Play, Pause, and Step, which correspond to the same buttons in Unity Editor and control the same behavior as Unity Editor does. A small Unity icon in the status bar will indicate whether Unity Editor is connected, refreshing, or in Play mode. Any changes applied in Rider in Edit mode will be instantly delivered to Unity Editor.

• Coding hints :
  • Rider provides top-notch code analysis for C#, and that includes Unity-specific code inspections and quick-fixes for them.
  • For example, Rider will warn you against using inefficient string literal comparison with the tag property, and will provide a quick-fix to rewrite this as a call to CompareTag.
  • Similarly, Rider will warn you if you try to use the new keyword to create a new instance of a class deriving from MonoBehaviour or ScriptableObject. Just press AltEnter to have Rider fix the problem for you.

Source : Unity