Visual Studio中的非英语数字格式

Question

In English-US, the decimal separator symbol is "." So if I want to write the result of 100 + 25/100, it will be 100.25 (obviously).

How will I write it in a constant in Visual Studio if I'm a french developer living in France? In France they use a comma (",") as a decimal seperator.

Will I write

const double x = 100.25

or

const double x = 100,25

Thank you

Answer 1

You write programs in C#, not in English. Use syntax of C#.

const float x = 100.25

When you show some information for non-Englsih user you can format it in appropriate view.

For ex.:

MessageBox.Show(x.ToString().Replace(".", ",")); // or some special format functions

Answer 2

The first. There are no cultural variants of C# compiler, the code is compilable by any compiler. Besides that, , has some different usages in C# that would be incompatible, eg separating entries in new List:

var data = new List<double> { 1.0, 2.0, 3.0 };

Answer 3

They will have to write 100.25 too. The source code itself is independent of culture. If this wasn't the case, you'd need some way to specify the culture to the compiler.

Programmers could declare the values as strings and then use double.Parse with an appropriate format provider, but that would be a runtime conversion and an inefficient way to declare values known at compile time.