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.NET MAUI Data Binding · dotnet | DecimalAI

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.NET MAUI Data Binding

dotnet/maui-data-binding

Source dotnet/skills ↗License MIT

Guidance for .NET MAUI XAML and C# data bindings — compiled bindings, INotifyPropertyChanged / ObservableObject, value converters, binding modes, multi-binding, relative bindings, fallbacks, and MVVM best practices. USE FOR: setting up compiled bindings with x:DataType, implementing INotifyPropertyChanged or CommunityToolkit ObservableObject, creating IValueConverter / IMultiValueConverter, choosing binding modes, configuring BindingContext, relative bindings, binding fallbacks, StringFormat, co

SkillScore100Maintained

Automatic

Frontend / UI pack

Last verified 8/4/2026

What it changes

Passed 24 of 24 test cases with the skill, and 22 of 24 without it.

Without skill92%

With skill100%

Checks it passed that the model alone missed

Includes XC0022 in WarningsAsErrors
Includes XC0025 in WarningsAsErrors
Omits explicit Mode=OneWay on Label bindings

and 2 more in the full report

2 fixed22 passed either way0 still failing0 broke

Pass-rate lift: +8 pp
Tokens: +153%
Agent turns: 0%
Response time: -34%

Model gemini-3.6-flashMeasured 8/4/2026v124 of 24 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/dotnet-maui-data-binding/SKILL.md https://app.decimal.ai/s/dotnet-maui-data-binding/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add dotnet-maui-data-binding, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/dotnet-maui-data-binding/ and pins it in .decimal/skills.lock

decimalai skills add dotnet-maui-data-binding

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/dotnet-maui-data-binding/SKILL.md https://app.decimal.ai/s/dotnet-maui-data-binding/SKILL.md

Raw file: /s/dotnet-maui-data-binding/SKILL.md ↗ · machine-readable summary at /s/dotnet-maui-data-binding.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 2

Prompt

We are updating our .NET MAUI app to enforce strict compiled bindings across the solution to improve runtime performance and prepare for NativeAOT. Could you explain and show the XML modifications needed for our .csproj file to treat uncompiled bindings as build errors, especially when using relative source bindings? Provide the project file snippet along with a short explanation of how to configure it.

What was checked, without and with the skill
Checked	Without skill	With skill
Includes MauiEnableXamlCBindingWithSourceCompilation set to true in project file	Missed	Passed
Includes XC0022 in WarningsAsErrors	Missed	Passed
Includes XC0025 in WarningsAsErrors	Missed	Passed

case-02 · gemini-3.6-flash · 8/4/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md403 lines2 files

.NET MAUI Data Binding

Wire UI controls to ViewModel properties with compile-time safety, correct change notification, and minimal overhead. Prefer compiled bindings everywhere and treat binding warnings as build errors.

When to Use

Adding x:DataType compiled bindings to a new or existing page
Implementing INotifyPropertyChanged or CommunityToolkit ObservableObject
Creating or consuming IValueConverter / IMultiValueConverter
Choosing the correct BindingMode for a control property
Setting BindingContext in XAML or code-behind
Using relative bindings (Self, AncestorType, TemplatedParent)
Applying StringFormat, FallbackValue, or TargetNullValue
Writing AOT-safe code bindings with SetBinding and lambdas (.NET 9+)

When Not to Use

CollectionView layouts / templates — use the maui-collectionview skill
Shell navigation parameters — use the maui-shell-navigation skill
Service registration / DI — use the maui-dependency-injection skill
Property-change-triggered animations — use built-in .NET MAUI animation APIs

Inputs

A .NET MAUI project targeting .NET 8 or later
XAML pages or C# code-behind where bindings are declared
A ViewModel class (or plan to create one)

Rules That Change the Answer

Apply these to every binding answer — they are the differences between "it compiles" and "it actually updates the UI".

Situation	Do this	Not this
Deciding where `x:DataType` goes	Put it wherever a binding scope starts — the page/view root, and each `DataTemplate`	Scattering it on arbitrary children that share the parent's `BindingContext`
A binding falls back to reflection (XC0022 / XC0023)	Add the right `x:DataType` for that binding scope; for XC0023 remove the explicit `x:DataType="{x:Null}"`	`x:DataType="x:Object"` to silence it — this disables compile-time checking
A `DataTemplate` inherits `x:DataType` from an outer scope (XC0024)	Give the `DataTemplate` its own `x:DataType`	Leaving it to resolve against the wrong type

Track record

Benchmark

24 / 24

test cases passed, vs 22 / 24 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

dotnet / skills

plugins/dotnet-maui/skills/maui-data-binding/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1Bundled 1 file

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

managedcode/maui-data-bindingGuidance for .NET MAUI XAML and C# data bindings — compiled bindings, INotifyPropertyChanged / ObservableObject, value converters, binding modes, multi-binding, relative bindings, fallbacks, and MVVM best practices. USE FOR: setting up compiled bindings with x:DataType, implementing INotifyPropertyChanged or CommunityToolkit ObservableObject, creating IValueConverter / IMultiValueConverter, choosing binding modes, configuring BindingContext, relative bindings, binding fallbacks, StringFormat, coNear-identical description+9 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

.NET MAUI Data Binding

When to Use

When Not to Use

Inputs

Rules That Change the Answer

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills