Question

For instance:

double d = 2.24;

If Culture is ‘fr’

d.ToString() -> "2,24" 

If culture is ‘en’

d.ToString() -> "2.24" 

This implicit culture-based cast can generate lot of mistakes.

In aspx.cs

<script>
var n = <% Response.Write(d.ToString()); %> // if 'fr' n = 2,24 -> js syntax error
</script>

We can avoid that with

Convert.ToString(d, CultureInfo.InvariantCulture);

Is there any option to made this InvariantCulture by default for ToString()?

Any idea why it is done by Default?

Answer 1

You could use the <globalization> element of your web.config and set a culture and a UI culture. For example:

<system.web>
    <globalization culture="en-US" uiCulture="en-US">
</system.web>

By the way instead of:

<script>
    var n = <% Response.Write(d.ToString()); %> // if 'fr' n = 2,24 -> js syntax error
</script>

I would recommend you to always use JavaScriptSerializer in order to JSON serialize the value when passing data to javascript:

<script>
    var n = <%= new JavaScriptSerializer.Serialize(d) %>;
</script>