It is the public documentation from the vendor that is what determines the rule logic target for updates. In this case MS15-101 details that .NET 2.0 is 'Not Applicable' and will not be targeted by Software Updates bundled in MS15-101 per Microsoft.
Unfortunately, development isn’t able to test every version of a Software if the vendor publication doesn't document the vulnerability, and if a test of the update does install on a version not documented by the vendor for IsApplicable; Patch Management Solution cannot modify the rule to include that version for IsApplicable=TRUE as it is not technically supported per the vendor's publicized documentation.
To reiterate; Patch Management Solution will only target what the vendor publically documents applicable.
In this case, the vendor, Microsoft, needs to advise why the documentation doesn’t show that .NET 2.0 is targeted and modify the article, or they need to modify the rule logic for targeting IsApplicable=TRUE in MBSA.
Please review with Microsoft to obtain their official response regarding MS15-101 targeting.
If Microsoft modifies the rule logic to target MS15-101 to update .NET 2.0; the targeting rule logic will be revised for MS15-101 in Patch Management Solution and TECH232960 will be updated.