How to create custom config section in app.config? [duplicate]

Question

I want to add a custom configuration section in my app.config file. Is there a way to do it and how can I access these settings in my program. Following is the config section I want to add to my app.config:

<RegisterCompanies>     <Companies>       <Company name="Tata Motors" code="Tata"/>       <Company name="Honda Motors" code="Honda"/>     </Companies> </RegisterCompanies> 

Answer 1

Import namespace :

using System.Configuration; 

Create ConfigurationElement Company :

public class Company : ConfigurationElement {          [ConfigurationProperty("name", IsRequired = true)]         public string Name         {             get             {                 return this["name"] as string;             }         }             [ConfigurationProperty("code", IsRequired = true)]         public string Code         {             get             {                 return this["code"] as string;             }         } } 

ConfigurationElementCollection:

public class Companies         : ConfigurationElementCollection     {         public Company this[int index]         {             get             {                 return base.BaseGet(index) as Company ;             }             set             {                 if (base.BaseGet(index) != null)                 {                     base.BaseRemoveAt(index);                 }                 this.BaseAdd(index, value);             }         }         public new Company this[string responseString]        {             get { return (Company) BaseGet(responseString); }             set             {                 if(BaseGet(responseString) != null)                 {                     BaseRemoveAt(BaseIndexOf(BaseGet(responseString)));                 }                 BaseAdd(value);             }         }          protected override System.Configuration.ConfigurationElement CreateNewElement()         {             return new Company();         }          protected override object GetElementKey(System.Configuration.ConfigurationElement element)         {             return ((Company)element).Name;         }     } 

and ConfigurationSection:

public class RegisterCompaniesConfig         : ConfigurationSection     {          public static RegisterCompaniesConfig GetConfig()         {             return (RegisterCompaniesConfig)System.Configuration.ConfigurationManager.GetSection("RegisterCompanies") ?? new RegisterCompaniesConfig();         }          [System.Configuration.ConfigurationProperty("Companies")]             [ConfigurationCollection(typeof(Companies), AddItemName = "Company")]         public Companies Companies         {             get             {                 object o = this["Companies"];                 return o as Companies ;             }         }      } 

and you must also register your new configuration section in web.config (app.config):

<configuration>            <configSections>           <section name="Companies" type="blablaNameSpace.RegisterCompaniesConfig, blablaAssemblyName" ..> 

then you load your config with

var config = RegisterCompaniesConfig.GetConfig(); foreach(var item in config.Companies) {    do something .. }