Include optional logger name in console output if it fails to load

src/Build/Logging/LoggerDescription.cs

@@ -89,7 +89,7 @@ internal int LoggerId
         /// <summary>
         /// This property generates the logger name by appending together the class name and assembly name
         /// </summary>
-        internal string Name
+        public string Name
         {
             get
             {
@@ -104,7 +104,7 @@ internal string Name
                 }
                 else
                 {
-                    return _loggerAssembly.AssemblyFile;
+                    return _loggerAssembly.AssemblyFile ?? _loggerAssembly.AssemblyName;
                 }
             }
         }

src/MSBuild.UnitTests/XMake_Tests.cs

@@ -2457,13 +2457,13 @@ public void MultipleTargetsDoesNotCrash()
         }
 
         [Theory]
-        [InlineData("-logger:,\"nonExistentlogger.dll\",IsOptional;Foo")]
-        [InlineData("-logger:ClassA,\"nonExistentlogger.dll\",IsOptional;Foo")]
-        [InlineData("-logger:,\"nonExistentlogger.dll\",IsOptional,OptionB,OptionC")]
-        [InlineData("-distributedlogger:,\"nonExistentlogger.dll\",IsOptional;Foo")]
-        [InlineData("-distributedlogger:ClassA,\"nonExistentlogger.dll\",IsOptional;Foo")]
-        [InlineData("-distributedlogger:,\"nonExistentlogger.dll\",IsOptional,OptionB,OptionC")]
-        public void MissingOptionalLoggersAreIgnored(string logger)
+        [InlineData("-logger:,\"nonExistentlogger.dll\",IsOptional;Foo", "nonExistentLogger.dll")]
+        [InlineData("-logger:ClassA,\"nonExistentlogger.dll\",IsOptional;Foo", "ClassA")]
+        [InlineData("-logger:,\"nonExistentlogger.dll\",IsOptional,OptionB,OptionC", "nonExistentLogger.dll")]
+        [InlineData("-distributedlogger:,\"nonExistentlogger.dll\",IsOptional;Foo", "nonExistentLogger.dll")]
+        [InlineData("-distributedlogger:ClassA,\"nonExistentlogger.dll\",IsOptional;Foo", "ClassA")]
+        [InlineData("-distributedlogger:,\"nonExistentlogger.dll\",IsOptional,OptionB,OptionC", "nonExistentLogger.dll")]
+        public void MissingOptionalLoggersAreIgnored(string logger, string expectedLoggerName)
         {
             string projectString =
                 "<Project>" +
@@ -2477,7 +2477,7 @@ public void MissingOptionalLoggersAreIgnored(string logger)
             var output = RunnerUtilities.ExecMSBuild(parametersLoggerOptional, out bool successfulExit, _output);
             successfulExit.ShouldBe(true);
             output.ShouldContain("Hello", customMessage: output);
-            output.ShouldContain("The specified logger could not be created and will not be used.", customMessage: output);
+            output.ShouldContain($"The specified logger \"{expectedLoggerName}\" could not be created and will not be used.", customMessage: output);
         }
 
         [Theory]

src/MSBuild/Resources/Strings.resx

@@ -1398,10 +1398,11 @@
     <comment>{StrBegin="MSBUILD : error MSB1058: "}</comment>
   </data>
   <data name="OptionalLoggerCreationMessage" UESanitized="true" Visibility="Public">
-    <value>The specified logger could not be created and will not be used. {0}</value>
+    <value>The specified logger "{0}" could not be created and will not be used. {1}</value>
     <comment>
       UE: This error is shown when a logger cannot be loaded and instantiated from its assembly.
-      LOCALIZATION: {0} contains the exception message explaining why the
+      LOCALIZATION: {0} contains the logger description passed on the command line or in a
+      response file. {1} contains the exception message explaining why the
       logger could not be created -- this message comes from the CLR/FX and is localized.
     </comment>
   </data>

src/MSBuild/XMake.cs

@@ -4275,7 +4275,7 @@ private static bool CreateAndConfigureLogger(
             }
             catch (Exception e) when (loggerDescription.IsOptional)
             {
-                Console.WriteLine(ResourceUtilities.FormatResourceStringStripCodeAndKeyword("OptionalLoggerCreationMessage", e.Message));
+                Console.WriteLine(ResourceUtilities.FormatResourceStringStripCodeAndKeyword("OptionalLoggerCreationMessage", loggerDescription.Name, e.Message));
                 return false;
             }