Can anyone help me with this, please? I would like to use it but when I add it to my server I get this error:

Error while compiling: SkinDownload.cs(45,49): error CS1061: Type `System.Collections.Generic.Dictionary<ulong,Rust.Workshop.ApprovedSkinInfo>' does not contain a definition for `Length' and no extension method `Length' of type `System.Collections.Generic.Dictionary<ulong,Rust.Workshop.ApprovedSkinInfo>' could be found. Are you missing an assembly reference?

Generally I would suggest contaacting the person who made the plugin, but the comment makes it clear they don't want to do that for you. The change would involve changing a few things though.

I have absolutely no experience with coding plugins. It seems like you understand what's going on there. Could you perhaps help me?

I've send it to you via PM.