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System.ArgumentException F# snippets #7428

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31 changes: 31 additions & 0 deletions samples/snippets/fsharp/VS_Snippets_CLR/ArgumentException/FS/argumentexception.fs
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module argumentexception
// Types:System.ArgumentException
//<snippet1>
open System

//<snippet2>
let divideByTwo num =
// If num is an odd number, raise an ArgumentException.
if num % 2 = 1 then
raise (ArgumentException("num", "Number must be even"))

// num is even, return half of its value.
num / 2;
//</snippet2>

// ArgumentException is not thrown because 10 is an even number.
printfn $"10 divided by 2 is {divideByTwo 10}"
try
// ArgumentException is thrown because 7 is not an even number.
printfn $"7 divided by 2 is {divideByTwo 7}"

with
| :? ArgumentException ->
// Show the user that 7 cannot be divided by 2.
printfn "7 is not divided by 2 integrally."

// This code produces the following output.
//
// 10 divided by 2 is 5
// 7 is not divided by 2 integrally.
//</snippet1>
13 changes: 13 additions & 0 deletions samples/snippets/fsharp/VS_Snippets_CLR/ArgumentException/FS/argumentexception.fsproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
</PropertyGroup>

<ItemGroup>
<Compile Include="argumentexception.fs" />
<Compile Include="argumentexception2.fs" />
</ItemGroup>

</Project>
28 changes: 28 additions & 0 deletions samples/snippets/fsharp/VS_Snippets_CLR/ArgumentException/FS/argumentexception2.fs
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module argumentexception2
// <Snippet3>
open System

let divideByTwo num =
// If num is an odd number, throw an ArgumentException.
if num % 2 = 1 then
invalidArg "num" $"{num} is not an even number"

// num is even, return half of its value.
num / 2;

// Define some integers for a division operation.
let values = [ 10; 7 ]
for value in values do
try
printfn $"{value} divided by 2 is {divideByTwo value}"
with
| :? ArgumentException as e ->
printfn $"{e.GetType().Name}: {e.Message}"

printfn ""

// This example displays the following output:
// 10 divided by 2 is 5
//
// ArgumentException: 7 is not an even number (Parameter 'num')
//</snippet3>
8 changes: 6 additions & 2 deletions xml/System/ArgumentException.xml
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For a list of initial property values for an instance of <xref:System.ArgumentException>, see the <xref:System.ArgumentException> constructors.


In F#, the [invalidArg](/dotnet/fsharp/language-reference/exception-handling/the-invalidarg-function) function may be used to generate and raise an ArgumentException,



## Examples
The following example demonstrates how to throw and catch an <xref:System.ArgumentException>. It uses the [ArgumentException.GetType().Name](xref:System.Type.Name%2A) property to display the name of the exception object, and also uses the <xref:System.ArgumentException.Message%2A> property to display the text of the exception message.

:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR/ArgumentException/cpp/argumentexception2.cpp" id="Snippet3":::
:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR/ArgumentException/CS/argumentexception2.cs" interactive="try-dotnet" id="Snippet3":::
:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR/ArgumentException/FS/argumentexception2.fs" id="Snippet3":::
:::code language="vb" source="~/samples/snippets/visualbasic/VS_Snippets_CLR/ArgumentException/vb/program2.vb" id="Snippet3":::

]]></format>
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:::code language="cpp" source="~/samples/snippets/cpp/VS_Snippets_CLR/ArgumentException/cpp/ArgumentException.cpp" id="Snippet2":::
:::code language="csharp" source="~/samples/snippets/csharp/VS_Snippets_CLR/ArgumentException/CS/argumentexception.cs" id="Snippet2":::

:::code language="fsharp" source="~/samples/snippets/fsharp/VS_Snippets_CLR/ArgumentException/FS/argumentexception.fs" id="Snippet2":::

]]></format>
</remarks>
</Docs>
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