C# Return type that matches type passed to function in C#

[BiGyElLoWhAt]

TL;DR Summary

I can't return var, but I don't know what type is passed to my function. I want to return the same type passed to it.

I am working on a project in C# that will be using arrays of various length that need to be determined at runtime.

I am attempting to write a small personal library of functions that act on arrays of various types.

Right now, I am trying to add an empty element to the end of an array, of arbitrary type (mostly different kinds of objects).

How can I make my function take in an array of arbitrary type, and return the same type. I'm pretty sure if I return Object[] that my return variable will be typeless, and I'm not sure how that will handle all of the objects already in the array, i.e. their parameters.

My original thought was to simply use var, but I can't return that. Do I need to reinstantiate each object as I loop through? If so, how do I dynamically call all the getters and setters?

I could potentially write individual methods for all different types, but that seems very tedious. I feel like there should be a better way.

 

[FactChecker]

You might be able to use some combination of typeof() and GetType.

 

[pbuk]

How can I make my function take in an array of arbitrary type, and return the same type.

Learn about generics: https://learn.microsoft.com/en-us/dotnet/csharp/fundamentals/types/generics.