From a3643b5bd85a1b5c145ca5f438d9e066ffc36d5b Mon Sep 17 00:00:00 2001
From: Stephane Delcroix <stephane@delcroix.org>
Date: Thu, 28 Jun 2018 00:41:16 +0200
Subject: [PATCH] [build] require .NET framework >= 4.7 (#3164)

---
 .nuspec/Xamarin.Forms.targets | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/.nuspec/Xamarin.Forms.targets b/.nuspec/Xamarin.Forms.targets
index 2a5b2ecc6..76fe76863 100644
--- a/.nuspec/Xamarin.Forms.targets
+++ b/.nuspec/Xamarin.Forms.targets
@@ -54,6 +54,15 @@
 			Condition="'$(IsXBuild)' == 'true'" />
 	</Target>
 
+	<Target Name="_ValidateNETFrameworkVersion"
+			BeforeTargets="_CheckForInvalidConfigurationAndPlatform"
+			Condition=" '$(TargetFrameworkIdentifier)' == '.NETFramework' AND '$(TargetFrameworkVersion.Substring(1))' &lt; '4.7' ">
+		<Error
+			Text="XF requires .NETFramework >= v4.7. You have '$(TargetFrameworkVersion)'"
+			Code="XF004"
+			 />
+	</Target>
+
 	<!-- XamlG -->
 	<Target Name="UpdateDesignTimeXaml" DependsOnTargets="XamlG"/>