Is there any way to find connected vertices in a mesh which was imported from Blender?

Well, I think the question is well explained.
What I want is to create a navigation mesh. But in this case I’ll just use connected vertices. So each edge represents a neighbor of a certain vertex.

Is this possible?

Thanks from now! Any help is much appreciated!

The index buffer will tell you which vertices are connected. If your mesh is made up of triangles then each set of 3 indices will be one triangle and the indices will refer to the 3 vertices that make it up.