Referencing additional class library assemblies
Stable scripting runtime: known limitations
Unity supports a modern .NET runtime. You may encounter the following issues when using the .NET runtime:
Code size
The stable scripting runtime comes with a larger .NET class library API than the legacy scripting runtime. This means the code size is frequently larger. This size increase may be significant, especially on size-constrained and Ahead-of-Time (AOT) platforms.
To mitigate code size increases:
- Choose the smallest .NET profile possible (see .NET profile support). The .NET Standard 2.0 profile is about half the size of the .NET 4.x profile, so use the .NET Standard 2.0 profile where possible.
- Enable Strip Engine Code in the Unity Editor Player Settings (go to Edit > Project Settings > Player). This option statically analyzes the managed code in the Project, and removes any unused code. Note: This option is only available with the IL2CPP scripting backend.
Transport Layer Security (TLS)
Modern Mono has TLS 1.2 support for a number of platforms. Unity supports TLS 1.0 in the .NET class libraries, and TLS only works for the Mac Standalone player. Where you require full TLS support, use UnityWebRequest or platform-specific native solutions. Unity is actively working on adding TLS 1.2 support for all .NET class library APIs on all platforms that Unity supports.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thanks for helping to make the Unity documentation better!
Referencing additional class library assemblies