Dictionary start

I am new to UIpath I need to know about dictionary and how it works. can some one explain me from scratch

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welcome to uipath community
–to create a dictionary variable in the variable panel
mention the variable name and in the type browse as system.collections.generic.dictionary(of string)(of string) --(here i have used both key and value as string but we can choose based on our need)
then in the default value mention as
new dictionary(of string)(string) //without value
new dictionary(of string)(string) from {“key1”,“value1”,“key2”,“value2”…} //wit h value

to know more about dictionary

Cheers @Vasanth

Thank you. Can you share a xaml file how it is saved along with different variable types