Actually I had develop the blazor webassembly application In this application when the externalapi failed due to internet disconnected at the time on blazor application UI shows the error like "One or more error occured". whenever I had checked the error using inspect on browser that is called "Failed load resource: :net:ERR_INTERNET_DISCONNECTED" catch block not helpful for caught the exception or error because when execution point came to the external api line at the time I got the error on browser due to internet disconnected I want to handle this error and need to show the custom message if internet disconnected please help me. Thanks