asp.net - Query web.config for a key - in values -

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can 1 let me know how bool result, verifying value exists in web.config's key.

scenario is,

i have tag in website...

<add key="isenabled" value="false"/> website,

on key value keep site 'on' , 'off' using

public static bool isenabled = convert.toboolean(webconfigurationmanager.appsettings["isenabled "]);  if(isenabled) { // }

now requirement got 3-4 websites now, want change above line like

<add key="sitesenabled" value="1,4,5"/>

because want enable 1st, 4th, 5th site

1 - static value 1st website, 2 - 2nd.....

but how do on , off...my websites like

public static bool onesiteenabled = convert.toboolean(webconfigurationmanager.appsettings[sitesenabled="1"]); // true  public static bool twositeenabled = convert.toboolean(webconfigurationmanager.appsettings[sitesenabled="2"]); //false

please let me know ...thanks

i this:

using system.linq;  var sitesenabled =      configurationmanager.appsettings["sitesenabled"] != null          ? configurationmanager.appsettings["sitesenabled"].split(',')          : new string[0];  var onesiteenabled = sitesenabled.contains("1"); var twositeenabled = sitesenabled.contains("2");

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