var normalizedString = text.Normalize(NormalizationForm.FormKC);

http://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.31/system.js

npm install systemjs

{
    "compileOnSave": true,
    "compilerOptions": {
        "target": "es5",
        "module": "commonjs",
        "moduleResolution": "node",
        "noEmitOnError": true,
        "removeComments": false,
        "sourceMap": true,
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "noImplicitAny": false,
        "suppressImplicitAnyIndexErrors": true
    },
    "exclude": [
        "node_modules",
        "wwwroot",
        "typings/main",
        "typings/main.d.ts",
        "bower_components"
    ]
}