Distance point to polyline

[Blinking chicken]

I do not know if I am on the right forum. But can I ask on this forum the following?

What math is used to calculate the distance from a point to a polyline in C#?

I mean, they can do it in Grasshopper, and Grasshopper is made in C#

And I want to know how to do it too

So, I can make new scripts in Grasshopper.

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