Add demo proxy fallback to WPF, WinForms, and console samples#5
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- fall back to the DevExpress demo proxy (https://api.devexpress.com/demo-openai) when the AZURE_OPENAI_* environment variables are not set - replace the env-var-only credential getters with local variables (demo key "DEMO", deployment "demo") - applies to both CS (App.xaml.cs) and VB (App.xaml.vb)
- fall back to the DevExpress demo proxy (https://api.devexpress.com/demo-openai) when the AZURE_OPENAI_* environment variables are not set - move credential resolution into RegisterDevExpressAI as local variables (demo key "DEMO", deployment "demo") - applies to both CS (Program.cs) and VB (Program.vb)
- fall back to the DevExpress demo proxy (https://api.devexpress.com/demo-openai) when the AZURE_OPENAI_* environment variables are not set - move credential resolution into the SampleAITextModifier constructor as local variables (demo key "DEMO", deployment "demo") - applies to both CS (Program.cs) and VB (Program.vb)
- update the registration code snippet to show the demo-proxy fallback - add a note that the sample falls back to the demo proxy (rate-limited, evaluation only)
mikhailovalex
approved these changes
Jun 10, 2026
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