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Feb 17, 2022
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System.FormattableString F# snippets #7728

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7 changes: 7 additions & 0 deletions snippets/fsharp/System/FormattableString/Format/Composite1.fs
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open System

let name = "Fred"
// <Snippet9>
String.Format("Name = {0}, hours = {1:hh}", name, DateTime.Now)
// </Snippet9>
|> ignore
10 changes: 10 additions & 0 deletions snippets/fsharp/System/FormattableString/Format/fs.fsproj
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<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>

<ItemGroup>
<Compile Include="Composite1.fs" />
</ItemGroup>
</Project>
11 changes: 10 additions & 1 deletion xml/System/FormattableString.xml
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Expand Up @@ -166,18 +166,26 @@

### Remarks

This static method may be imported in C# by:
This static method may be imported in C# or F# by:

```csharp
using static System.FormattableString;
```

``fsharp
open type System.FormattableString
```

Within the scope of that import directive, an interpolated string may be formatted in the current culture by writing, for example:

```csharp
CurrentCulture($"{{ lat = {latitude}; lon = {longitude} }}");
```

```fsharp
CurrentCulture $"{{ lat = {latitude}; lon = {longitude} }}"
```

]]></format>
</remarks>
</Docs>
Expand Down Expand Up @@ -223,6 +231,7 @@ Within the scope of that import directive, an interpolated string may be formatt
A composite format string consists of zero or more runs of fixed text intermixed with one or more format items, which are indicated by an index number delimited with brackets (for example, `{0}`). The index of each format item corresponds to an argument in an object list that follows the composite format string. For example, in the following statement:

:::code language="csharp" source="~/snippets/csharp/System/FormattableString/Format/Composite1.cs" id="Snippet9":::
:::code language="fsharp" source="~/snippets/fsharp/System/FormattableString/Format/Composite1.fs" id="Snippet9":::
:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/Formatting.Composite/vb/Composite1.vb" id="Snippet9":::

the composite format string is `"Name = {0}, hours = {1:hh}"`.
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