Guard

Argument validation utility class following the fail-fast principle.

API Reference

Method	Description
NotNull<T>(T? value)	Throws ArgumentNullException if null
NotNullOrEmpty(string?)	Throws if string is null or empty
NotNullOrWhiteSpace(string?)	Throws if string has no content
GreaterThan<T>(T, T min)	Throws if value <= min
LessThan<T>(T, T max)	Throws if value >= max
InRange<T>(T, T min, T max)	Throws if outside range
Positive<T>(T)	Throws if value <= 0
NotNegative<T>(T)	Throws if value < 0
NotEmpty(Guid)	Throws if Guid.Empty
ValidEmail(string?)	Throws if invalid email format
MaxLength(string?, int)	Throws if exceeds length
MinLength(string?, int)	Throws if below length
DefinedEnum<TEnum>(TEnum)	Throws if enum not defined
Ensure(bool, string)	Throws if condition false