How to configure store logs to application folder in Asp Net Core?

Built-in logging providers for ASP.NET Core applications are:

• Console
• Debug
• EventSource
• EventLog
• TraceSource
• Azure App Service

None of these classes can be used for logging to the file by default.
However, you can use tracing listener, which can be set up for file usage, like this:

public void Configure(IApplicationBuilder app,
    IHostingEnvironment env,
    ILoggerFactory loggerFactory)
{
    loggerFactory
        .AddDebug();

    // add Trace Source logging
    var testSwitch = new SourceSwitch("sourceSwitch", "Logging Sample");
    testSwitch.Level = SourceLevels.Warning;
    loggerFactory.AddTraceSource(testSwitch,
        new TextWriterTraceListener("MyLogName.txt"));

As you can see, here you can filter your messages, right now it will write down all the warnings and higher messages. Also you can setup a filter for listener:

var testSwitch = new SourceSwitch("sourceSwitch", "Logging Sample");
var listener = new TextWriterTraceListener("MyLogName.txt");
listener.Filter = new SourceFilter("YourFilterName");
loggerFactory.AddTraceSource(testSwitch, listener);

In consumer classes this can be used as:

logger = loggerFactory.CreateLogger("YourFilterName");

Related articles:

• Logging in ASP.NET Core on CodeProject
• MSDN article Essential .NET - Logging with .NET Core