exports issue when compile TS => JS

I'm trying TypeScript especially to work with classes but I encounter an issue after my TS file is compiled in JS.

Here is the TS code for my class (PartenaireTSModel.ts):

export namespace Partenaires {
    export class Partenaire {
        private _IdPartenaire : number;
        private _DateCreation : Date;   

        public get IdPartenaire(){ return this._IdPartenaire; }
        public set IdPartenaire(idPartenaire: number){ this._IdPartenaire = idPartenaire; }

        public get DateCreation(){ return this._DateCreation; }
        public set DateCreation(dateCreation: Date){ this._DateCreation = dateCreation; }
    }
} 

My TS code (Partenaires.ts):

import { Partenaires } from "./Models/PartenaireTSModel"

let partenaire = new Partenaires.Partenaire();
partenaire.IdPartenaire = 12;

After compiling the result in JS (Partenaires.js):

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var PartenaireTSModel_1 = require("./Models/PartenaireTSModel");
var partenaire = new PartenaireTSModel_1.Partenaires.Partenaire();
partenaire.IdPartenaire = 12;

I have this error when I launch my app : Uncaught ReferenceError: exports is not defined. (on line 2 of Partenaires.js)

Also tried :

import p = require("./Models/PartenaireTSModel");
let partenaire = new p.Partenaires.Partenaire(); 

instead of this :

import { Partenaires } from "./Models/PartenaireTSModel"
let partenaire = new Partenaires.Partenaire();

But I get the same error.

Here is my tsconfig.js :

{
  "compilerOptions": {
    "noImplicitAny": false,
    "noEmitOnError": true,
    "removeComments": false,
    "sourceMap": true,
    "target": "es5",
    "outDir": "wwwroot/js"
  },
  "include": [
    "TSScripts/**/*"
  ],
  "exclude": [
    "node_modules",
    "wwwroot"
  ]
}

Can someone help me ?

Thank you,

Philippe