Converts the specified year to a four-digit year by using the Calendar.TwoDigitYearMax property to determine the appropriate century.
Syntax
Parameters
- year
Returns
An integer that contains the four-digit representation of year.
Remarks
Calendar.TwoDigitYearMax is the last year in the 100-year range that can be represented by a two-digit year. The century is determined by finding the sole occurrence of the two-digit year within that 100-year range. For example, if Calendar.TwoDigitYearMax is set to 2029, the 100-year range is from 1930 to 2029. Therefore, a 2-digit value of 30 is interpreted as 1930, while a 2-digit value of 29 is interpreted as 2029.
If year is greater than or equal to 100, the value of year is returned unchanged.
Calendar.ToFourDigitYear(int) supports either a two-digit year or a four-digit year. Passing a two-digit year value (less than 100) causes the method to convert the value to a four-digit value according to the Calendar.TwoDigitYearMax value representing the appropriate century. If the application supplies a four-digit year value that is within the supported calendar range to Calendar.ToFourDigitYear(int), the method returns the actual input value. If the application supplies a four-digit value that is outside the supported calendar range, or if it supplies a negative value, the method throws an exception.
Requirements
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0