<PackageReference Include="System.Runtime" Version="4.0.21-beta-23409" />

Action<T1, T2, T3, T4, T5, T6, T7, T8, T9>

public sealed delegate Action<T1, T2, T3, T4, T5, T6, T7, T8, T9> : MulticastDelegate
Encapsulates a method that has nine parameters and does not return a value.
public Action(object object, IntPtr method)

public virtual IAsyncResult BeginInvoke(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, AsyncCallback callback, object object)

public virtual void EndInvoke(IAsyncResult result)

public virtual void Invoke(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9)