从app.config文件中读取

Question

I am trying to print to Console.Write the value of the key name from the following app.config file.

 <?xml version="1.0" encoding="utf-8" ?>
    <configuration>
      <appSettings>
        <add key="name" value="Chan" />
      </appSettings>
    </configuration>

C# code :

Console.Write(ConfigurationManager.AppSettings["name"]);

Nothing gets printed in the console. Why is this ?

Note: I have added a reference to the System.Configuration dll

Answer 1

below code gives you the content of active config file.

var content  = File.ReadAllLines(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile);

Check what you get as content , is it contain key="name" value="Chan" or something else ?

if you given <add key="name" value="Chan" /> then ConfigurationManager.AppSettings["name"] should return as Chan

Answer 2

Given that your XML file (app.config) is properly formatted , try below.
Declare a variable and assign the variable the AppSettings value. Similar like-

string sName = "";
sName = ConfigurationManager.AppSettings["name"].ToString();