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c#performancereflectionmethodinfo

What is the most efficient way to ask a MethodInfo how many parameters it takes?

What is the most efficient way to ask a MethodInfo if it accepts parameters and, if so, how many?

My current solutions would be: methodInfo.GetParameters().Any() and methodInfo.GetParameters().Count().

Is this the most efficient way?

Since I don't actually need any of the ParameterInfo objects, is there a way to do this without a call to GetParameters()?

Solution

  • The two you listed are for LINQ. Any() returns bool - stating that there is at least one. Count() is used any on IEnumerable<T>.

    Length (the property) will be the fastest because GetParameters() returns ParameterInfo[].

    It does not appear that MethodInfo have any other way to access the number of parameters other than GetParameters().