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Platform and Framework Compatibility - .NET SDK

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  • Frameworks
  • Android Deployment
  • Limitations

The following table shows which .NET and Xamarin framework version(s) you can use with Realm on your target platforms:

Target Platform
Supported Framework Version(s)
Debian 8 or later
RHEL 7.1 or later
Ubuntu 16.04 or later
.NET Core 2.0 or later
Windows 8.1 or later
.NET Core 2.0 or later
.NET Framework 4.6.1 or later
Universal Windows Platform (UWP)
.NET Standard 2.0 or later (Fall Creators Update)
Android API level 16 or later
Xamarin.Android for API level 16 or later
macOS 10.11 or later (Intel-based Macs)
.NET Core 2.0 or later
Xamarin.Mac for macOS 10.11 or later
iOS 9 or later
Xamarin.iOS for iOS 9 or later


The Realm .NET SDK only supports Intel64 Macs and does not yet support Macs with the Apple M1 chip.

Due to some instruction set limitations, Realm does not support deploying Android apps to the armeabi ABI. Because default templates often have different ABI settings for Debug and Release modes, your app may throw a System.TypeInitializationException exception in Release mode but not when it was running in Debug mode.

To avoid this, verify the ABI settings for both Debug and Release modes. To check and change the settings, follow the steps in the Visual Studio CPU Architectures page.

Unless you have a good reason to avoid linking other ABIs, we recommend checking all of the settings other than armabi:

ABI settings

Realm has limits imposed to balance flexibility with performance. The SDK throws an exception during app initialization if the following limits are exceeded:

  • Class names can't exceed 57 bytes in length.

  • Property names can't exceed 63 bytes in length.

In addition, for iOS apps, the total size of all open Realm files cannot be larger than the amount of memory your application is allowed to map in iOS. This varies per device, and depends on how fragmented the memory space on the device is. If you need to store more data than is allowed, you can split your data into multiple Realm files, open a realm only when needed, and close it when it is no longer needed.

For more information, see Open Radar 17119975.

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