Compares this instance to a specified object and returns an indication of their relative values.
A 32-bit signed integer that indicates the relative order of the values compared. The return value has these meanings:
| Value | Meaning | 
|---|---|
| Less than zero | This instance is less than r. | 
| Zero | This instance is equal to r. | 
| Greater than zero | This instance is greater than r. -or- r is a null reference (Nothing in Visual Basic). | 
r must be an instance of Level or a null reference (Nothing in Visual Basic); otherwise, an exception is thrown.
| Exception Type | Condition | 
|---|---|
| ArgumentException | r is not a Level. | 
Level Class | log4net.Core Namespace