Compiler Error CS1609
Modifiers cannot be placed on event accessor declarations
Modifiers can only be placed on event declarations and not on the event accessor declarations. For more information, see Using Properties (C# Programming Guide).
Example
The following sample generates CS1609.
// CS1609.cs
// compile with: /target:library
delegate int Del();
class A
{
public event Del MyEvent
{
private add {} // CS1609
// try the following line instead
// add {}
remove {}
}
}