Decimal. Parse string, postfixed by a minus sign

Question

decimal decimalVal;
Decimal.TryParse(\"123-\", out decimalVal);
Console.WriteLine(decimalVal); // -123

Why do \"123-\" string parsed this way?

Answer 1

NumberStyles.Number enumerator is used by default:

Indicates that the AllowLeadingWhite, AllowTrailingWhite, AllowLeadingSign, AllowTrailingSign, AllowDecimalPoint, and AllowThousands styles are used. This is a composite number style

http://msdn.microsoft.com/en-us/library/system.globalization.numberstyles.aspx