Gets or sets the string designator for hours that are "ante meridiem" (before noon).
Syntax
Value
The string designator for hours that are before noon.
Exceptions
Type Reason ArgumentNullException The value specified for a set operation is a null reference. InvalidOperationException The current instance is read-only and a set operation was attempted.
Remarks
The DateTimeFormatInfo.AMDesignator property is used for all times from 0:00:00 (midnight) to 11:59:59.999.
If a custom format string includes the "tt" format specifier and the time is before noon, the DateTime.ToString or DateTimeOffset.ToString method includes the value of the DateTimeFormatInfo.AMDesignator property in place of "tt" in the result string. If the custom format string includes the "t" custom format specifier, only the first character of the DateTimeFormatInfo.AMDesignator property value is included. You should use "tt" for languages for which it is necessary to maintain the distinction between A.M. and P.M. An example is Japanese, in which the A.M. and P.M. designators differ in the second character instead of the first character.
For cultures that do not use an A.M. designator, this property returns an empty string.
Requirements
Assembly: mscorlib (in mscorlib.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0, 4.0.0.0