Removed unnecessary logger extension

Author: rossgrambo

src/Microsoft.FeatureManagement.Telemetry.AzureMonitor/AzureMonitorEventPublisher.cs

@@ -91,7 +91,35 @@ private void HandleFeatureFlagEvent(ActivityEvent activityEvent)
                 }
             }
 
-            _logger.LogFeatureEvaluation("FeatureEvaluation", properties);
+            LogFeatureEvaluation("FeatureEvaluation", properties);
+        }
+
+        private void LogFeatureEvaluation(string eventName, Dictionary<string, object> properties)
+        {
+            if (string.IsNullOrEmpty(eventName))
+            {
+                throw new ArgumentException("Event name cannot be null or empty.", nameof(eventName));
+            }
+
+            // Build the message template dynamically with placeholders for each property
+            var templateBuilder = new System.Text.StringBuilder("{microsoft.custom_event.name}");
+            var args = new List<object> { eventName };
+
+            if (properties != null && properties.Count > 0)
+            {
+                foreach (var kvp in properties)
+                {
+                    templateBuilder.Append($" {{{kvp.Key}}}");
+                    args.Add(kvp.Value);
+                }
+            }
+
+            // Use structured logging to ensure each property becomes a separate custom dimension
+            _logger.Log(
+                LogLevel.Information,
+                new EventId(1, "microsoft.custom_event.name"),
+                templateBuilder.ToString(),
+                args.ToArray());
         }
     }
 }

src/Microsoft.FeatureManagement.Telemetry.AzureMonitor/LoggerExtensions.cs

@@ -17,18 +17,13 @@ services.AddFeatureManagement()
 
 ## How It Works
 
-The package uses an `ActivityListener` to listen to feature evaluation events from the Microsoft.FeatureManagement library. When a feature flag is evaluated, the event is logged using a structured logging extension method:
+The package uses an `ActivityListener` to listen to feature evaluation events from the Microsoft.FeatureManagement library. When a feature flag is evaluated, the event is logged using structured logging.
 
-```csharp
-_logger.LogFeatureEvaluation("FeatureEvaluation", properties);
-```
-
-This extension method formats the event data properly for Azure Monitor ingestion using the `LoggerMessage.Define` pattern for high-performance logging. The properties dictionary is serialized to JSON and included in the log message.
+The event data is formatted properly for Azure Monitor ingestion using the `LoggerMessage.Define` pattern for high-performance logging. The properties dictionary is serialized to JSON and included in the log message.
 
 ## Key Components
 
 - **AzureMonitorEventPublisher**: Listens to Activity events from feature management and logs them using the logger extension
-- **LoggerExtensions**: Provides optimized logging methods for feature evaluation events
 - **AzureMonitorHostedService**: Manages the lifecycle of the event publisher
 - **FeatureManagementBuilderExtensions**: Provides extension methods to register the telemetry components