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Compiler Error CS1686

Local 'variable' or its members cannot have their address taken and be used inside an anonymous method or lambda expression

This error is generated when you use a variable, and attempt to take its address, and one of these actions is done inside an anonymous method.

The following sample generates CS1686.

// CS1686.cs
// compile with: /unsafe /target:library
class MyClass
{
   public unsafe delegate int * MyDelegate();

   public unsafe int * Test()
   {
      int j = 0;
      MyDelegate d = delegate { return &j; };   // CS1686
      return &j;   // OK
   }
}

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