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

// search all nodes
using (ArcGIS.Core.Data.Analyst3D.TinNodeCursor nodeCursor = tinDataset.SearchNodes(null))
{
  while (nodeCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinNode node = nodeCursor.Current)
    {

    }
  }
}

// search within an extent
ArcGIS.Core.Data.Analyst3D.TinNodeFilter nodeFilter = new ArcGIS.Core.Data.Analyst3D.TinNodeFilter();
nodeFilter.FilterEnvelope = envelope;
using (ArcGIS.Core.Data.Analyst3D.TinNodeCursor nodeCursor = tinDataset.SearchNodes(nodeFilter))
{
  while (nodeCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinNode node = nodeCursor.Current)
    {

    }
  }
}

// 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 nodeCursor = tinDataset.SearchNodes(nodeFilter))
{
  while (nodeCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinNode node = nodeCursor.Current)
    {

    }
  }
}

// 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 nodeCursor = tinDataset.SearchNodes(nodeFilter))
{
  while (nodeCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinNode node = nodeCursor.Current)
    {

    }
  }
}

// search all edges
using (ArcGIS.Core.Data.Analyst3D.TinEdgeCursor edgeCursor = tinDataset.SearchEdges(null))
{
  while (edgeCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinEdge edge = edgeCursor.Current)
    {

    }
  }
}

// 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 edge = edgeCursor.Current)
    {

    }
  }
}

// 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 edge = edgeCursor.Current)
    {

    }
  }
}

// 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 edge = edgeCursor.Current)
    {

    }
  }
}

// search all triangles
using (ArcGIS.Core.Data.Analyst3D.TinTriangleCursor triangleCursor = tinDataset.SearchTriangles(null))
{
  while (triangleCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinTriangle triangle = 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 triangleCursor = tinDataset.SearchTriangles(triangleFilter))
{
  while (triangleCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinTriangle triangle = 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 triangleCursor = tinDataset.SearchTriangles(triangleFilter))
{
  while (triangleCursor.MoveNext())
  {
    using (ArcGIS.Core.Data.Analyst3D.TinTriangle triangle = triangleCursor.Current)
    {

    }
  }
}