'C# VSTO -- Detection of unused slide layouts
I am programming a PowerPoint add-in in C# (VSTO).
About my problem, I want to delete all master slides that are not used. I have been programming this function for quite a long time now and I can't get it to work. I also can't find a solution anywhere.
In the attached picture, you can see what I want to check.
I hope one of you can help me, I thank you in advance.
Sources
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