fix Id

src/BenchmarkDotNet/Loggers/StreamLogger.cs

@@ -11,5 +11,7 @@ public StreamLogger(StreamWriter writer) : base(writer) { }
         public StreamLogger(string filePath, bool append = false)
             : this(new StreamWriter(filePath, append))
         { }
+
+        public override string Id => nameof(StreamLogger);
     }
 }

src/BenchmarkDotNet/Loggers/TextLogger.cs

@@ -11,8 +11,9 @@ public class TextLogger : ILogger, IDisposable
 
         public void Dispose() => writer.Dispose();
 
-        public string Id => nameof(TextLogger);
+        public virtual string Id => nameof(TextLogger);
         public int Priority => 0;
+
         public void Write(LogKind logKind, string text) => writer.Write(text);
 
         public void WriteLine() => writer.WriteLine();