Release SDK 1.0.3296.44, for Runtime 137 (Jun. 3, 2025)

Release notes for Microsoft Edge WebView2 SDK, release date: Jun. 3, 2025.

NuGet package for WebView2 SDK 1.0.3296.44

For full API compatibility, this Release version of the WebView2 SDK requires WebView2 Runtime 137.0.3296.44 (Jun. 3, 2025) or later.

Promotions to Phase 3 (Stable in Release)

The following APIs have been promoted from Phase 2: Stable in Prerelease, to Phase 3: Stable in Release, and are now included in this Release SDK.

Set default background color on WebView2 initialization (DefaultBackgroundColor API)

The DefaultBackgroundColor API allows users to set the DefaultBackgroundColor property at initialization. This prevents a disruptive white flash during the WebView2 loading process.

Previous phase: Set default background color on WebView2 initialization (DefaultBackgroundColor API) in Prerelease SDK 1.0.3296-prerelease, for Runtime 137 (May. 12, 2025).

.NET/C#

• CoreWebView2ControllerOptions Class:
  • CoreWebView2ControllerOptions.DefaultBackgroundColor Property

WinRT/C#

• CoreWebView2ControllerOptions Class:
  • CoreWebView2ControllerOptions.DefaultBackgroundColor Property

Win32/C++

• ICoreWebView2ControllerOptions3
  • ICoreWebView2ControllerOptions3::get_DefaultBackgroundColor
  • ICoreWebView2ControllerOptions3::put_DefaultBackgroundColor

See also

• Runtime 137.0.3296.44 (Jun. 3, 2025)
• Release notes for WebView2
  • Release notes for the WebView2 Runtime
  • Release notes for WebView2 SDKs