The seven kinds of shading, the ShadingType entry of a shading dictionary.
[SuppressMessage("Design", "CA1008:Enums should have zero value", Justification = "The values are the numbers the PDF entry holds; 0 is not one of them.")]
public enum PdfShadingType
ISO 32000-2 §8.7.4.5.1, Table 77.
kind:method, kind:property, kind:ctor. Press Esc to clear.AxialType 2: colour varying along an axis (§8.7.4.5.3, Table 79).CoonsPatchMeshType 6: a mesh of Coons patches, bounded by four cubic Bézier curves (§8.7.4.5.7, Table 83).FreeFormTriangleMeshType 4: a free-form mesh of triangles with colours at their vertices (§8.7.4.5.5, Table 81).FunctionBasedType 1: colour as a function of two variables over a domain (§8.7.4.5.2, Table 78).LatticeFormTriangleMeshType 5: a lattice of triangles with colours at their vertices (§8.7.4.5.6, Table 82).RadialType 3: colour varying between two circles (§8.7.4.5.4, Table 80).TensorProductPatchMeshType 7: a mesh of tensor-product patches, sixteen control points each (§8.7.4.5.8).