how to fix compiler error?

i just downloaded an asset from the asset store. it is a tutorial with scripts already written. i get an error say:

error CS1061: Type UnityEngine.Mesh' does not contain a definition for GetTriangleStrip’ and no extension method GetTriangleStrip' of type UnityEngine.Mesh’ could be found (are you missing a using directive or an assembly reference?)

the line of code is:

int curStripCount = combine.mesh.GetTriangleStrip(combine.subMeshIndex).Length;

I also think that Length at the end will cause an error too.

How do i fix that error? does anyone have suggestions?

GetTriangleStrip is obsolete. However,here is a workaround.