Example with using statement fails to compile and run

[rpetrusha]

Example with using statement fails to compile and run

In the Standard Numeric Format Strings article, the example in The General ("G") Format Specifier fails to compile. Error messages indicate that the culprit is the using System; statement.

If the using System; statement is removed, the code successfully compiles but throws an OutOfMemoryException.

This behavior has been reported in two issues in the dotnet/docs repo: dotnet/docs#11250 and dotnet/docs#11413.

Where did this error occur?

• docs.microsoft.com

What kind of error was it?

• using System statement can't be compiled.
• Removing using System statement throws OutOfMemoryException.

Screenshots
See dotnet/docs#11413

[mairaw]

@jonsequitur @LadyNaggaga can we please prioritize this? It's breaking some of our interactive tutorials experience.

[LadyNaggaga]

@mairaw - @jonsequitur opened an issue here and is having convo with @BillWagner

[jonsequitur]

The issue here is that this content was written to run against Try .NET's C# scripting backend, which allows both method declarations and top-level statements. It is now running under our Blazor runner and being inlined into a Main method for you, with normal C# language rules. This then leads content that already contains a Main to fail to compile.

You can fix this sample by removing the wrapping method, so that it looks like this:

double original = 0.84551240822557006;
var rSpecifier = original.ToString("R");
var g17Specifier = original.ToString("G17");

var rValue = Double.Parse(rSpecifier);
var g17Value = Double.Parse(g17Specifier);

Console.WriteLine($"{original:G17} = {rSpecifier} (R): {original.Equals(rValue)}");
Console.WriteLine($"{original:G17} = {g17Specifier} (G17): {original.Equals(g17Value)}");

// The example displays the following output:
//     0.84551240822557006 = 0.84551240822557: False
//     0.84551240822557006 = 0.84551240822557006: True