MulticastDelegate change to Func<DbContext ，Object>

[tangdf]

The DynamicInvoke method of MulticastDelegate is too poor.

https://github.com/tangdf/EntityFramework.DynamicFilters/blob/7ed94eb3a45ff141f0c7ea8fbec9a405e53ca2f2/src/DelegateBenchmark/DelegateInvoking.cs#L10-L40

Benchmark results:

Method	Mean	Error	StdDev
MulticastDelegate_DynamicInvoke	528.562 ns	2.5630 ns	2.3974 ns
FunDelegate_Invoke	3.573 ns	0.0227 ns	0.0202 ns

[JonathanMagnan]

Hello @tangdf ,

Thank you for reporting, we will look at it.

I'm not sure yet how we will handle this change since we want to stay backward compatible. We might support both (your solution and the MulticastDelegate)

Best Regards,

Jonathan

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