Returns a value indicating whether two specified Level 
            objects have different values.
            
Namespace: log4net.Core
Assembly: log4net (in log4net.dll) Version: 2.0.8.0-.NET 4.0
Syntax
Parameters
- l
- Type: log4net.CoreLevel
 A Level or .
- r
- Type: log4net.CoreLevel
 A Level or .
Return Value
Type: Booleantrue if the value of l is different from the value of r; otherwise, false.
Remarks
Compares two levels.
See Also