In den BindingParameters von BindingContext wurde mehr als ein IStreamUpgradeProviderElement gefunden. Dies ist im Allgemeinen darauf zurückzuführen, dass eine CustomBinding mehrere IStreamUpgradeProviderElements enthält. Entfernen Sie alle Elemente bis auf eins.

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More than one IStreamUpgradeProviderElement was found in the BindingParameters of the BindingContext. This usually is caused by having multiple IStreamUpgradeProviderElements in a CustomBinding. Remove all but one of these elements.

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