How Can I Determine if a Date Falls Within a Specified Date Range in C#?

Determining Date Range Inclusion in C#

Many developers encounter scenarios where determining if a particular date falls within a specified date range is necessary. Consider the following scenario:

Problem:

You are given three dates: a date to check, a start date, and an end date. How can you ascertain if the date to check is within the date range specified by the start and end dates?

Solution:

The most straightforward method involves a simple comparison:

bool isWithinRange = dateToCheck >= startDate && dateToCheck < endDate;

This expression confirms that the date to check is greater than or equal to the start date and less than the end date, indicating its inclusion within the date range.

Considerations:

• Time Zones: DateTime, being a complex data type, can represent dates in different time zones. To ensure accurate comparisons, ensure that all dates are expressed in the same time zone.
• Inclusivity/Exclusivity: Consider if the date range should be inclusive or exclusive at its boundaries. The code provided treats the lower bound as inclusive and the upper bound as exclusive, so the range includes the start date but excludes the end date.

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