<PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.2" />

Microsoft.Extensions.Logging.LoggerMessageAttribute

public sealed class LoggerMessageAttribute : Attribute
Provides information to guide the production of a strongly typed logging method.
namespace Microsoft.Extensions.Logging { public sealed class LoggerMessageAttribute : Attribute { public int EventId { get; set; } public string EventName { get; set; } public LogLevel Level { get; set; } public string Message { get; set; } public bool SkipEnabledCheck { get; set; } public LoggerMessageAttribute(); public LoggerMessageAttribute(int eventId, LogLevel level, string message); public LoggerMessageAttribute(LogLevel level, string message); public LoggerMessageAttribute(LogLevel level); public LoggerMessageAttribute(string message); } }