c# - Property or indexer 'System.DateTime.TimeOfDay' cannot be assigned to — it is read only -

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i saw lots of duplicate post of me it's different.

i have datetime object , time portion & assign time that.when i'm going assign it raise error.

in here newstartdategroup datetime object in here opentime timespan

property or indexer cannot assigned — read only

else if(newstartdategroup.timeofday < i.opentime && newenddategroup.timeofday > i.closetime) // < >  {         newstartdategroup.timeofday = i.opentime;

datetime struct in .net immutable, instead of changing it's values have create new one:

newstartdategroup = newstartdategroup.date.add(i.opentime);

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