Learning SignalR: Unable to get property ‘client’ of undefined or null reference

One of the most common exceptions you will hit when you first started with a SignalR chat program could look like the following: Unhandled exception at line 78, column 13 in http://localhost:53632/home/chat 0x800a138f – JavaScript runtime error: Unable to get property ‘client’ of undefined or null reference Why? This is mostly like caused by the…

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