[REQ] [AspNetCore] Set EmitDefaultValue to true

[taylor-burns]

Same Issue as described here:
#3274 (comment)

But for the AspNetCore generator

[wing328]

Can you please file a PR for the aspnetcore generator or sponsor this change?

[hauntingEcho]

Opened a PR which may address this, if your concern is for non-nullable value types (long/int/bool/etc): #11280