Fixed build breaks

* Refined derivation checks to handle interfaces as the "base" uniquely
* updated message on docs build project for clarity and easier readability in build logs.

Author: smaillet

docfx/documentation.msbuildproj

@@ -54,6 +54,6 @@
   </ItemGroup>
 
   <Target Name="AlwaysRun" BeforeTargets="AfterBuild">
-    <Message Importance="High" Text="NOTE: Building this target does NOTHING, docs are built using the docfx tool. This project is simply a convenient placeholder for organizing/editing files"/>
+    <Message Importance="High" Text="NOTE: Building $(MSBuildProjectFile) does NOTHING, docs are built using the docfx tool. This project is simply a convenient placeholder for organizing/editing files"/>
   </Target>
 </Project>

src/ReferenceEqualityVerifier/ReferenceEqualityVerifier.Test/ReferenceEqualityVerifierUnitTests.cs

@@ -200,7 +200,7 @@ bool Baz(IBaz x)
                 return this == x; // OOPS = Reference equality!
             }
 
-            bool Baz(IBaz x)
+            bool Baz2(Class1 x)
             {
                 return x == this; // OOPS = Reference equality!
             }

src/ReferenceEqualityVerifier/ReferenceEqualityVerifier/ReferenceEqualityAnalyzer.cs

@@ -145,14 +145,20 @@ private static bool AreEquivalent( ITypeSymbol typeSymbol, ITypeSymbol lht, ITyp
 
         private static bool IsDerivedFrom( ITypeSymbol derivedType, ITypeSymbol testBaseType )
         {
-            for(ITypeSymbol? baseType = derivedType; baseType != null; baseType = baseType.BaseType)
+            if (testBaseType.TypeKind == TypeKind.Interface)
             {
-                if(SymbolEqualityComparer.Default.Equals( baseType, testBaseType ))
+                return derivedType.AllInterfaces.Contains( testBaseType, SymbolEqualityComparer.Default );
+            }
+            else
+            {
+                for(ITypeSymbol? baseType = derivedType; baseType != null; baseType = baseType.BaseType)
                 {
-                    return true;
+                    if(SymbolEqualityComparer.Default.Equals( baseType, testBaseType ))
+                    {
+                        return true;
+                    }
                 }
             }
-
             return false;
         }