Log4net 1.2.10.0 !!exclusive!! Jun 2026

<log4net> <!-- Appenders and loggers go here --> </log4net> </configuration>

| Practice | Recommendation | |----------|----------------| | Check log level | Always wrap log.Debug() in if (log.IsDebugEnabled) to avoid parameter evaluation overhead | | Async logging | Not built-in – use a separate ForwardingAppender or background queue manually | | PatternLayout | Use %message only where possible; avoid expensive lookups like %method or %stacktrace | | FileAppender | Use MinimalLock model for shared logs, but expect lower throughput | | AdoNetAppender | Enable connection pooling; batch inserts using custom logic | log4net 1.2.10.0

public static List<log4net.Core.LoggingEvent> Events = new List<log4net.Core.LoggingEvent>(); protected override void Append(log4net.Core.LoggingEvent loggingEvent) &lt;log4net&gt; &lt;

if (log.IsDebugEnabled) log.Debug($"Processing order orderId"); Events = new List&lt

Because log4net 1.2.10.0 uses a specific that differs from newer versions (starting from 1.2.11.0), it frequently causes "Could not load file or assembly" errors in modern projects.

Install-Package log4net -Version 1.2.10