The following code outputs "Hello, world!" as a trace message to the console when in a .NET Framework console application. When the same code is used in a .NET Core console application, it outputs nothing.
Program.cs
using System.Diagnostics;
namespace ConsoleApp5
{
class Program
{
private readonly static TraceSource traceSource = new TraceSource("ConsoleApp5", SourceLevels.All);
static void Main(string[] args)
{
traceSource.TraceEvent(TraceEventType.Information, 0, "Hello, world!");
}
}
}App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<system.diagnostics>
<trace autoflush="true">
<listeners>
<add name="consoleTraceListener" />
<add name="textWriterTraceListener" />
</listeners>
</trace>
<sharedListeners>
<add name="consoleTraceListener" type="System.Diagnostics.ConsoleTraceListener" traceOutputOptions="DateTime,ThreadId" />
<add name="textWriterTraceListener" type="System.Diagnostics.TextWriterTraceListener" traceOutputOptions="DateTime,ThreadId" initializeData="Trace.log" />
</sharedListeners>
<sources>
<source name="ConsoleApp5" switchValue="Verbose">
<listeners>
<add name="consoleTraceListener" />
<add name="textWriterTraceListener" />
</listeners>
</source>
</sources>
</system.diagnostics>
</configuration>
Also, I found that if I try to read a connection string using System.Configuration.ConfigurationManager and I have the system.diagnostics section in the App.config, I receive the following error. I'm assuming that .NET Core doesn't have a machine.config where the system.diagnostics section would normally be defined?
Unhandled Exception: System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: Unrecognized configuration section system.diagnostics. (C:\Users\jemiller\Documents\Visual Studio 2017\Projects\Library2\LibraryConsoleApplication\bin\Debug\netcoreapp2.0\LibraryConsoleApplication.dll.config line 6)
at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
--- End of inner exception stack trace ---
at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
at System.Configuration.ClientConfigurationSystem.PrepareClientConfigSystem(String sectionName)
at System.Configuration.ClientConfigurationSystem.System.Configuration.Internal.IInternalConfigSystem.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.GetSection(String sectionName)
at System.Configuration.ConfigurationManager.get_ConnectionStrings()
at LibraryLibrary.LibraryContext..ctor(String name) in C:\Users\jemiller\Documents\Visual Studio 2017\Projects\Library2\LibraryLibrary\LibraryContext.cs:line 43
at LibraryLibrary.LibraryContext..ctor() in C:\Users\jemiller\Documents\Visual Studio 2017\Projects\Library2\LibraryLibrary\LibraryContext.cs:line 39
at LibraryConsoleApplication.Program.Main(String[] args) in C:\Users\jemiller\Documents\Visual Studio 2017\Projects\Library2\LibraryConsoleApplication\Program.cs:line 13
Is there I way I could specify the section similar to the following to get it to work? That is how it is defined in machine.config for .NET Framework.
<configSections>
<section name="system.diagnostics" type="System.Diagnostics.SystemDiagnosticsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
</configSections>Is there some other way in .NET Core to specify that configuration settings for system.diagnostics?
The following code outputs "Hello, world!" as a trace message to the console when in a .NET Framework console application. When the same code is used in a .NET Core console application, it outputs nothing.
Program.cs
App.config
Also, I found that if I try to read a connection string using System.Configuration.ConfigurationManager and I have the system.diagnostics section in the App.config, I receive the following error. I'm assuming that .NET Core doesn't have a machine.config where the system.diagnostics section would normally be defined?
Is there I way I could specify the section similar to the following to get it to work? That is how it is defined in machine.config for .NET Framework.
Is there some other way in .NET Core to specify that configuration settings for system.diagnostics?