I tried #Jessycormier’s method and it didn’t work for me.
I ran DataContractJsonSerializer to see what it would generate and I found that gave me a value that looked more like this.
{"PassedTimeSpan":"P1DT2H3M4S"}
The value shown above was for 1 day, 2 hours, 3 minutes, and 4 seconds.
So it looks like format is:
[-]P[{days}D][T[{hours}H][{min}M][{sec}S]]
Where:
– Indicates negative timespan, omitted for positive values
P must be the first character (unless negative time value)
T must precede the time portion of the timespan.
[] = optional part that may be omitted if 0.