Dispatch exceptions to Blazor’s sync context

[guardrex]

• PU Issue
• API Proposal
• PU PR

This will be a H3 under the Synchronization context section.

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Document Details

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• ID: 81a32115-33f8-7d06-aaf0-b8ce918b5527
• Version Independent ID: 31ad18df-1904-bbdd-cfed-8d0d0267c10e
• Content: ASP.NET Core Razor components
• Content Source: aspnetcore/blazor/components/index.md
• Product: aspnet-core
• Technology: aspnetcore-blazor
• GitHub Login: @guardrex
• Microsoft Alias: riande

[guardrex]

@Rick-Anderson ... something 🐟 just happened here. The dotnet-bot added my labels for "Blazor" and "Source - Docs.ms" and then took them off for no apparent reason ☝️ ... so I'll re-add the "Blazor" one manually now. I think there's a 😈 in the label management now.

[Rick-Anderson]

@guardrex keep me posted. If this re-occurs, I'll open a support issue with the build team.