Why i cant use bitmap class on dll class?

For example:

Public Class Class1
   Public Sub Some()
       Dim Image As New Bitmap("C:\image.bmp")
   End Function
End Class

Displays an error on Bitmap which says开发者_运维问答 "Name Bitmap is not declared".

Some solution? is impossible use Bitmap class or another class?

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Are you referencing the System.Drawing.dll assembly and importing the System.Drawing namespace?

Right-click on the Bitmap identifier and see if Visual Studio asks you to add an import for it.