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JSON outputTemplate in Serilog Console log not showing Timestamp #163

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@mtotaro

Description

@mtotaro

Hi 👋,

I'm experiencing an issue with the outputTemplate in Serilog when trying to log JSON-formatted messages to the console. Instead of rendering the actual values, it outputs placeholder words such as {Timestamp:HH:mm:ss}, {Level:w3}, etc. I expected to see actual timestamps, severity levels, and messages in the log output.

Details:

Serilog Package ID and Version: Serilog 4.0.1
Toolchain, Framework, and OS: .NET 8 SDK on Windows 10.
Configuration:
Here’s a sample configuration for WriteTo in appsettings.json:

"WriteTo": [    {        "Name": "AmazonCloudWatch",        "Args": {            "logGroup": "test",            "logStreamPrefix": "app",            "region": "eu-west-1",            "restrictedToMinimumLevel": "Information",            "createLogGroup": true        }    },    {        "Name": "Console",        "Args": {            "theme": "Serilog.Sinks.SystemConsole.Themes.AnsiConsoleTheme::Code, Serilog.Sinks.Console",            "formatter": "Serilog.Formatting.Json.JsonFormatter, Serilog",            "outputTemplate": "{\"time\": \"{Timestamp:HH:mm:ss}\", \"severity\": \"{Level:w3}\", \"msg\": \"{Message:lj}\", \"exception\": \"{Exception}\", \"correlationID\": \"{TraceId}\" }{NewLine}"        }    }]

Current Behavior:

The console output currently shows the following instead of the actual values:

{"time": "{Timestamp:HH:mm:ss}", "severity": "inf", "msg": "Request finished HTTP/2 GET https://localhost:7026/_vs/browserLink - 200 null text/javascript; charset=UTF-8 215.1437ms", "exception": "", "correlationID": "e08cdf60b8bb30c12f7ae2db8f592935" }}

As shown, placeholder such as {Timestamp:HH:mm:ss} is not being replaced with actual values.

Thanks in advance!

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