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Duplicate image file errors #1799

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Oct 18, 2023
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Duplicate image file errors #1799

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Duplicate image file errors
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24 changes: 24 additions & 0 deletions docs/troubleshooting.md
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Expand Up @@ -236,4 +236,28 @@ For troubleshooting purposes, a blank splash screen can be generated if you don'

Generating a blank splash screen will override any custom splash screen and will cause app store rejection. However, it can be a useful approach in testing to ensure that your app UI is correct.

## Duplicate image filename errors

You may encounter build errors about duplicate image filenames:

> One or more duplicate file names were detected. All image output filenames must be unique.

This can occur for `MauiIcon` and `MauiImage` items. For example, the following `MauiImage` items in an `<ItemGroup>` node in your project file will result in this error:

```xml
<MauiImage Include="Resources\Images\*" />
<MauiImage Include="Resources\Images\dotnet_bot.svg" BaseSize="168,208" />
```

This occurs because from .NET 8, .NET MAUI checks to ensure that there are no duplicate image resource filenames.

If you receive this build error it can be fixed by ensuring that your project file doesn't include duplicate images. To do this, change any `MauiIcon` or `MauiImage` that references a specific file to use the `Update` attribute instead of the `Include` attribute:

```xml
<MauiImage Include="Resources\Images\*" />
<MauiImage Update="Resources\Images\dotnet_bot.svg" BaseSize="168,208" />
```

For information about MSBuild item element attributes, see [Item element (MSBuild): Attributes and elements](/visualstudio/msbuild/item-element-msbuild#attributes-and-elements).

::: moniker-end
1 change: 1 addition & 0 deletions docs/whats-new/dotnet-8.md
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Expand Up @@ -33,6 +33,7 @@ For information about what's new in .NET 8, see [What's new in .NET 8](/dotnet/c
- The <xref:Microsoft.Maui.Controls.DragStartingEventArgs>, <xref:Microsoft.Maui.Controls.DragEventArgs>, <xref:Microsoft.Maui.Controls.DropEventArgs>, and <xref:Microsoft.Maui.Controls.DropCompletedEventArgs> objects that accompany drag and drop gesture events each gain a `PlatformArgs` property. This property provides access to the platform-specific arguments for a drag or drop event. For more information, see [Recognize a drag and drop gesture](~/fundamentals/gestures/drag-and-drop.md).
- For troubleshooting purposes, resource generation can be disabled. For more information, see [Disable image packaging](~/troubleshooting.md#disable-image-packaging), [Disable splash screen packaging](~/troubleshooting.md#disable-splash-screen-packaging), [Disable font packaging](~/troubleshooting.md#disable-font-packaging), and [Disable asset file packaging](~/troubleshooting.md#disable-asset-file-packaging).
- For troubleshooting purposes, a blank splash screen can be generated. For more information, see [Generate a blank splash screen](~/troubleshooting.md#generate-a-blank-splash-screen).
- Resizeter checks for duplicate image filenames. For more information, see [Duplicate image filename errors](~/troubleshooting.md#duplicate-image-filename-errors).

The following types or members have been deprecated:

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