They are indeed tlbimp warning. You can check that if you run

TlbImp.exe "C:\Program Files (x86)\Common Files\System\Ole DB\oledb32.dll"

from VS developer command prompt (or from a path like C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.7.2 Tools, adapt to your machine).

You should see the exact same warnings.

If you don't use the members listed in the warning, you're pretty much safe.

Otherwise, you can remove all COM reference warning if you edit the .csproj and add the ResolveComReferenceSilent key to the first PropertyGroup element, like this:

<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  ...
  <PropertyGroup>
    ...
    <ResolveComReferenceSilent>True</ResolveComReferenceSilent>
    ...
  </PropertyGroup>

The last solution is to use tlbimp.exe manually and reference its output. There is an example here: Suppress tlbimp warnings in visual studio