SYMPTOMS
On Windows Server, if you install a version of the
common language runtime that is newer than the one that is currently on
the system, you will see two sets of available performance counters for ASP.NET
that have the same names.
For example, if a system has an initial
version of 1.0.3215.11 and you then install version 1.0.3423.0, the following
is what you would expect to see in the list of available performance counters:
ASP.NET
ASP.NET Applications
ASP.NET Apps v1.0.3215.11
ASP.NET Apps v1.0.3423.0
ASP.NET v1.0.3215.11
ASP.NET v1.0.3423.0
This is what you actually see:
ASP.NET
ASP.NET Applications
ASP.NET Apps v1.0.3423.0
ASP.NET Apps v1.0.3423.0
ASP.NET v1.0.3423.0
ASP.NET v1.0.3423.0
Note that both names of all the performance counters reflect the
same version. However, they are
not truly the same performance counters. The existing performance
counters were renamed to reflect the most recently installed version. The
performance counters should not have been renamed.
NOTE: This problem is not limited to the specific performance counters
that are in the example.