A string containing the decimal separator.
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.
The NumberFormatInfo.NumberDecimalSeparator property is used with the "E", "F", "G", "N", and "R" standard format strings to define the symbol that separates integral from fractional digits. For more information, see Standard Numeric Format Strings.
The initial value of this property is derived from the settings in the Region and Language item in Control Panel.