fix: Remove console output when disposing WriteApi (#101)

Author: kvakulo

CHANGELOG.md

@@ -1,11 +1,11 @@
 ## 1.9.0 [unreleased]
 
 ### API
-
 1. [#94](https://github.com/influxdata/influxdb-client-csharppull/94): Update swagger to latest version
 
 ### Bug Fixes
 1. [#100](https://github.com/influxdata/influxdb-client-csharp/pull/100): Thread-safety disposing of clients 
+1. [#101](https://github.com/influxdata/influxdb-client-csharp/pull/101/): Use Trace output when disposing WriteApi 
 
 ## 1.8.0 [2020-05-15]
 

Client/WriteApi.cs

@@ -194,12 +194,12 @@ protected internal WriteApi(
                     exception =>
                     {
                         _disposed = true;
-                        Console.WriteLine($"The unhandled exception occurs: {exception}");
+                        Trace.WriteLine($"The unhandled exception occurs: {exception}");
                     },
                     () =>
                     {
                         _disposed = true;
-                        Console.WriteLine("The WriteApi was disposed.");
+                        Trace.WriteLine("The WriteApi was disposed.");
                     });
         }
 
@@ -649,4 +649,4 @@ private bool Equals(BatchWriteOptions other)
                    Precision == other.Precision;
         }
     }
-}
+}