How to convert Object variable type into a string

Question

How to convert Object variable type into a string

 

My simple code

void Polygon_Clicked(object sender, EventArgs e) {
try {
var tempData =(Polygon)sender;
var data = tempData.BindingContext; }
catch (Exception exp)
{
DisplayAlert("Error", $"Oops! Something went wrong. {exp.Message}", "OK");
}
}

How to convert the following line of code to a list

var data = tempData.BindingContext;