The <code>Obsolete</code> attribute can be applied with or without arguments, but marking something <code>Obsolete</code> without including advice as to why it's obsolete or on what to use instead will lead maintainers to waste time trying to figure those things out - every single time the warning is encountered.

== Noncompliant Code Example

----
public class Car
{

  [Obsolete]  // Noncompliant
  public void CrankEngine(int turnsOfCrank) 
  { ... }
}
----

== Compliant Solution

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public class Car
{

  [Obsolete("Replaced by the automatic starter")]
  public void CrankEngine(int turnsOfCrank) 
  { ... }
}
----