public enum TinFilterType : System.Enum, System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable  

{
  // search all nodes that intersect the data extent
  using (ArcGIS.Core.Data.Analyst3D.TinNodeCursor nodeCursorsearch = tinDataset.SearchNodes(null))
  {
    while (nodeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinNode nodeCurrent = nodeCursor.Current)
      {
        // do something with the node
      }
    }
  }

  // search within an extent
  ArcGIS.Core.Data.Analyst3D.TinNodeFilter nodeFilter = new ArcGIS.Core.Data.Analyst3D.TinNodeFilter();
  nodeFilter.FilterEnvelope = envelope; //or use any other appropriate envelope
  using (ArcGIS.Core.Data.Analyst3D.TinNodeCursor nodeCursorSearch = tinDataset.SearchNodes(nodeFilter))
  {
    while (nodeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinNode nodeCurrent = nodeCursor.Current)
      {
        // do something with the node
      }
    }
  }

  // search all "inside" nodes
  nodeFilter = new ArcGIS.Core.Data.Analyst3D.TinNodeFilter();
  nodeFilter.FilterType = ArcGIS.Core.Data.Analyst3D.TinFilterType.InsideDataArea;
  using (ArcGIS.Core.Data.Analyst3D.TinNodeCursor nodeCursorSearch = tinDataset.SearchNodes(nodeFilter))
  {
    while (nodeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinNode nodeCurrent = nodeCursor.Current)
      {
        // do something with the node
      }
    }
  }

  // search for super nodes only
  nodeFilter = new ArcGIS.Core.Data.Analyst3D.TinNodeFilter();
  nodeFilter.FilterEnvelope = tinDataset.GetSuperNodeExtent();
  nodeFilter.SuperNode = true;
  using (ArcGIS.Core.Data.Analyst3D.TinNodeCursor nodeCursorSearch = tinDataset.SearchNodes(nodeFilter))
  {
    while (nodeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinNode nodeCurrent = nodeCursor.Current)
      {
        // do something with the node
      }
    }
  }
}

{
  // search all single edges that intersect the data extent
  using (ArcGIS.Core.Data.Analyst3D.TinEdgeCursor edgeCursor = tinDataset.SearchEdges(null))
  {
    while (edgeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinEdge edgeCurrent = edgeCursor.Current)
      {
        // do something with the edge
      }
    }
  }

  // search within an extent
  ArcGIS.Core.Data.Analyst3D.TinEdgeFilter edgeFilter = new ArcGIS.Core.Data.Analyst3D.TinEdgeFilter();
  edgeFilter.FilterEnvelope = envelope;
  using (ArcGIS.Core.Data.Analyst3D.TinEdgeCursor edgeCursor = tinDataset.SearchEdges(edgeFilter))
  {
    while (edgeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinEdge edgeCurrent = edgeCursor.Current)
      {
        // do something with the edge
      }
    }
  }

  // search all "inside" edges
  edgeFilter = new ArcGIS.Core.Data.Analyst3D.TinEdgeFilter();
  edgeFilter.FilterType = ArcGIS.Core.Data.Analyst3D.TinFilterType.InsideDataArea;
  using (ArcGIS.Core.Data.Analyst3D.TinEdgeCursor edgeCursor = tinDataset.SearchEdges(edgeFilter))
  {
    while (edgeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinEdge edgeCurrent = edgeCursor.Current)
      {
        // do something with the edge
      }
    }
  }

  // search for hard edges
  edgeFilter = new ArcGIS.Core.Data.Analyst3D.TinEdgeFilter();
  edgeFilter.FilterByEdgeType = true;
  edgeFilter.EdgeType = ArcGIS.Core.Data.Analyst3D.TinEdgeType.HardEdge;
  using (ArcGIS.Core.Data.Analyst3D.TinEdgeCursor edgeCursor = tinDataset.SearchEdges(edgeFilter))
  {
    while (edgeCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinEdge edgeCurrent = edgeCursor.Current)
      {
        // do something with the edge
      }
    }
  }
}

{
  // search all triangles that intersect the data extent
  using (ArcGIS.Core.Data.Analyst3D.TinTriangleCursor triangleSearchCursor = tinDataset.SearchTriangles(null))
  {
    while (triangleCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinTriangle triangleCurrent = triangleCursor.Current)
      {

      }
    }
  }

  // search within an extent
  ArcGIS.Core.Data.Analyst3D.TinTriangleFilter triangleFilter = new ArcGIS.Core.Data.Analyst3D.TinTriangleFilter();
  triangleFilter.FilterEnvelope = envelope;
  using (ArcGIS.Core.Data.Analyst3D.TinTriangleCursor triangleSearchCursor = tinDataset.SearchTriangles(triangleFilter))
  {
    while (triangleCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinTriangle triangleCurrent = triangleCursor.Current)
      {

      }
    }
  }

  // search all "inside" triangles
  triangleFilter = new ArcGIS.Core.Data.Analyst3D.TinTriangleFilter();
  triangleFilter.FilterType = ArcGIS.Core.Data.Analyst3D.TinFilterType.InsideDataArea;
  using (ArcGIS.Core.Data.Analyst3D.TinTriangleCursor triangleSearchCursor = tinDataset.SearchTriangles(triangleFilter))
  {
    while (triangleCursor.MoveNext())
    {
      using (ArcGIS.Core.Data.Analyst3D.TinTriangle triangleCurrent = triangleCursor.Current)
      {

      }
    }
  }
}