How to Write Constants Containing Multiple Values in C# Console App? -

let's wanted create constant return exchange fees me double in c#. here in javascript:

var exchangefees = {   fidelity: .25,   etrade: .2,   scotttrade: .15 } 

this way, can import , have work sort of enum: exchangefees.fidelity me fee need, , clear. in typescript, bit less rational:

//i realized static class after typed export class exchangefees {   fidelity: number;   etrade: number;   scotttrade: number;     constructor() {     this.fidelity= .25;     this.etrade= .2;     this.scotttrade = .15;    } }  export const exchangefees : exchangefees = new exchangefees (); 

this seems hacky-as-hell, javascript, whatchu gonna do, etc. seems hacky in c# though, create static class , put in constants.cs file so? there better way?

public static class exchangefess {     public static double fidelity = .25;     public static double etrade = .2;     public static double scotttrade = .15; } 

i read answer here, should put in appsettings somehow or there no point?

i realize 101 question, not sure approaching cleanly.

what have fine. alternative write:

public sealed class exchangefess {     public const double fidelity = .25;     public const double etrade = .2;     public const double scotttrade = .15; } 

in order have field constant. however, comes drawbacks of own, see here.

however, values don't seem constant, , shouldn't baked code. should use type of configuration system. appsettings does provide functionality, me doesn't seem correct place put it. i'd have configuration file or database application reads @ start up.

then, use code is, replace hard coded values (optionally cached) lookup configuration.