NETSDK1149

docs/core/tools/sdk-errors/netsdk1149.md

@@ -0,0 +1,21 @@
+---
+title: "NETSDK1149: Built-in WinRT support not provided in .NET 5+"
+description: How to reference a component with built-in WinRT support from an app that targets .NET 5 or later.
+author: tdykstra
+ms.author: tdykstra
+ms.topic: error-reference
+ms.date: 06/28/2021
+f1_keywords:
+- NETSDK1149
+---
+# NETSDK1149: Built-in WinRT support not provided in .NET 5+"
+
+NETSDK1149 indicates that you're trying to reference a component that requires WinRT in an application that targets .NET 5 or a later version. These .NET versions don't have built-in support for WinRT. The full error message is similar to the following example:
+
+> *\<Component name>* cannot be referenced because it uses built-in support for WinRT, which is no longer supported in .NET 5 and higher.  An updated version of the component supporting .NET 5 is needed.
+
+If your application calls Windows Runtime APIs, resolve this error by changing the application's Target Framework Moniker (TFM) to a value that targets Windows 10. For more information, see [Call Windows Runtime APIs in desktop apps](/windows/apps/desktop/modernize/desktop-to-uwp-enhance).
+
+If your application calls a 3rd party WinRT component, get an updated version of the component that supports .NET 5. You can generate an updated version by using [C#/WinRT](/windows/uwp/csharp-winrt/).
+
+For more information, see [Built-in support for WinRT is removed from .NET](../../compatibility/interop/5.0/built-in-support-for-winrt-removed.md).

docs/fundamentals/toc.yml

@@ -208,6 +208,8 @@ items:
         href: ../core/tools/sdk-errors/netsdk1141.md
       - name: NETSDK1145
         href: ../core/tools/sdk-errors/netsdk1145.md
+      - name: NETSDK1149
+        href: ../core/tools/sdk-errors/netsdk1149.md
   - name: .NET CLI
     items:
     - name: Overview