Check if timestamp is X seconds old in C#?

I have two unix timestamps old and new and I want to check if 30 seconds has passed between them. I want to check if oldTs is 30 seconds old or not. Basically if oldTs is <= 30 second old then I want to return true otherwise I want to return false.

long oldTs = long.Parse(processData.timestamp);
long currentTimestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

return currentTimestamp >= (oldTs + TimeSpan.FromSeconds(30));

I tried above code but I get an error as –

Operator '+' cannot be applied to operands of type 'long' and 'TimeSpan'

What is wrong I am doing here?

Answers:

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Method 1

Set both variables in seconds. You have to simply to oldTS + 30.

You can get the the unix timestamp like this

long unixTimestamp = (long)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;

Method 2

This return a TimeSpan data type.

TimeSpan.FromSeconds(30)

You can try get the milliseconds of it.

TimeSpan.FromSeconds(30).TotalMilliseconds

I hope it helps. Happy coding.

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