https://learn.microsoft.com/ja-jp/dotnet/api/microsoft.extensions.hosting.ihostlifetime.waitforstartasync?view=net-10.0-pp
IHostLifetime.WaitForStartAsync(CancellationToken) Method (Microsoft.Extensions.Hosting) |...
Called at the start of StartAsync(CancellationToken) which will wait until it's complete before continuing. This can be used to delay startup until signaled by...
cancellationtokenmethodmicrosoftextensionshosting