asp.net - How to get the file path using key from webconfig file -

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i have json file stored in d drive. have mentioned same in web config file. please refer below code

    <appsettings>     <add key="inputfilepath" value="d:\products.json"/>     </appsettings>

when try file path using below code, getting null value.

    string filepath = configurationmanager.appsettings["inputfilepath"];

please can 1 me on this

you need call this

string filepath = configurationmanager.appsettings["inputfilepath"].tostring();

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