Több IStreamUpgradeProviderElement elem található a BindingContext BindingParameters paramétereiben. Ezt leggyakrabban a több IStreamUpgradeProviderElement elem okozza a CustomBinding kötésben. Egy kivételével távolítsa el ezeket az elemeket.

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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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