Mesh - Determining which Face belongs to a Vertice

@RIL wrote:

Using VB.NET, when I examine a Rhino.Geometry.Mesh and its properties

    mesh.Vertices
    mesh.Faces
    mesh.Normals

.. then I believe that the Vertices and their Normals are accessed at the same index.

Q1: But how do I find a Face starting from a Vertex or a (vertex) Normal? (not conflating Normals with FaceNormals). What I want to do is to delete the Face that references a certain Vertex.
Q2: And before deleting the Face, I guess that have to delete each Vertex of the Face explicitly?
Q3: Would the result be a valid mesh only if ensuring that the Mesh is unwelded before starting to delete faces & vertices?

// Rolf

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