Merge pull request castleproject#661 from stakx/enhancements/default-interface-members

Add support for default interface members in inheritance-based proxy types

Author: stakx

CHANGELOG.md

@@ -5,6 +5,7 @@
 Enhancements:
 - Two new generic method overloads `proxyGenerator.CreateClassProxy<TClass>([options], constructorArguments, interceptors)` (@backstromjoel, #636)
 - Allow specifying which attributes should always be copied to proxy class by adding attribute type to `AttributesToAlwaysReplicate`. Previously only non-inherited, with `Inherited=false`, attributes were copied. (@shoaibshakeel381, #633)
+- Support for C# 8+ [default interface methods](https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/proposals/csharp-8.0/default-interface-methods) in interface and class proxies without target (@stakx, #661)
 
 Bugfixes:
 - `ArgumentException`: "Could not find method overriding method" with overridden class method having generic by-ref parameter (@stakx, #657)

buildscripts/common.props

@@ -1,7 +1,7 @@
 <Project>
 
 	<PropertyGroup>
-		<LangVersion>9.0</LangVersion>
+		<LangVersion>11.0</LangVersion>
 		<NoWarn>$(NoWarn);CS1591;CS3014;CS3003;CS3001;CS3021</NoWarn>
 		<NoWarn>$(NoWarn);CS0612;CS0618</NoWarn> <!-- TODO: Remove this line once `[Obsolete]` members have been dealt with. -->
 		<RepositoryType>git</RepositoryType>