Default values for method parameters have to be compile-time constants, as the default values are actually copied to all the call sites of the method by the compiler.
You have to use an overload to do this:
public bool Broadcast(byte command, MemoryStream data, bool async) {
return Broadcast(command, data, async, t => true);
}
public bool Broadcast(byte command, MemoryStream data, bool async, Func<T, bool> predicate) {
// ...
}
Also, there is a specific Predicate<T>
delegate in mscorlib which you can use instead. It's the same signature as Func<T, bool>
, but it explicitly marks it as a delegate which decides whether an action is performed on instances of T
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