log4net SDK Reference |

# LogImpl.WarnFormat Method (String, Object)

Logs a formatted message string with the `WARN` level.

[Visual Basic]
Overridable Overloads Public Sub WarnFormat( _
ByVal format As String, _
ByVal arg0 As Object _
) _
Implements ILog.WarnFormat
[C#]
public virtual void WarnFormat(
string format,
object arg0
);

#### Parameters

format
  A String containing zero or more format items
arg0
  An Object to format

#### Implements

ILog.WarnFormat

#### Remarks

The message is formatted using the Format method. See `String.Format` for details of the syntax of the format string and the behavior of the formatting.

The string is formatted using the InvariantCulture format provider. To specify a localized provider use the WarnFormat method.

This method does not take an Exception object to include in the log event. To pass an Exception use one of the Warn methods instead.

#### See Also

LogImpl Class | log4net.Core Namespace | LogImpl.WarnFormat Overload List