how to use if condtion in linq c#?

I have a table of data having startdate, enddate and time for example

startdate     enddate          time
03/19/2020    03/19/2020       15:23
03/19/2020    03/20/2020       12:26
03/19/2020    03/19/2020       05:23
03/19/2020    03/19/2020       09:23
03/19/2020    03/21/2020       04:23 

I want to use LINQ query to get a minimum of time when startdate = enddate

I use this query

time = table.Where(x => x.StartDate == x.EndDate).Min(x=>x.time)

but when I run this code it gives me exception InValidOperationException was unhandled by user code

another query I have to use is

time = table.OrderBy(x=>x.StartDate == x.EndDate).First().Time

but it is giving me an incorrect output

Any suggestion how can I fix this