Represents the largest possible value of a double. This field is constant.
The value of this constant is positive 1.7976931348623157E+308.
The result of an operation that exceeds double.MaxValue is double.PositiveInfinity. In the following example, double.PositiveInfinity results from addition, multiplication, and exponentiation operations when the result exceeds double.MaxValue.
code reference: System.Double.MaxValue#1