Experiment with using InterpolatedString for structured logging in Asp.Net Core 2.0 Standard logging extensions work as string.Format where instead of using number you use name of n-th parameter from the array of passed objects:
logger.LogInformation("Request finished in {ElapsedTime} with message {Message} and code {StatusCode}", elapsed, msg, code);Instead these extensions enable you to use c# 6 interpolated strings:
logger.LogInformation($"Request finished in {elapsed:ElapsedTime} with message {msg:Message} and code {code:StatusCode}");You can even format them:
logger.LogInformation($"Request finished in {elapsed:ElapsedTime:ff} ms with message {msg:Message,20} and code {code:StatusCode:000}");String ([a-zA-Z][a-zA-Z0-9]*) after the first colon is used as a name for the object in the log's state. If you don't want to name the object and put into the state but you still want to format it, use underscore _ instead of the name:
logger.LogInformation($"Request finished in {elapsed:_:ff} ms with code {code}");