c# - The type or namespace name 'Device' does not exist in the namespace 'System' -

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I am trying to work whose purpose is supported by Net Framework 4.5. I'm working on Winodws 8 and I have the .Net Framework 4.5, but I'm getting the name of the type or name space 'device' namespace is not present in the 'system' error

Any solution?

type or namespace name 'XXX'

Always keep in mind, if you get this error then there are three possibilities.

  1. You have not forgotten the instructions to use. / Li>
  2. You do not remember the assembly reference
  3. You have put "assembly reference" in place of "use of directing", but the goal structure of the current project is called assembly assembly reference Structure is less than version.

    The problem should be solved with almost all the cases above three steps.

    Hope it helps.

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