How do I add rows in datagrid on visual studio?

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C#

Visual-Studio

WPF

I am trying to make an application that can computes levels(levelling procedure as done by surveyors). i am learning to use visual studio 2015. i have a three button controls and a grid control and also three textbox controls. the datagrid is supposed to receive numeric values from the three textboxes and add them to a new row. i do not know how to achieve this and would appreciate some help as this would aid in fast tracking the levelling calculations in my upcoming project.Thanks

What I have tried:

ive looked through the internet on adding rows to a datagrid but have seen mainly those of the datagridview and sql tables.