Ensure

Ensure static class with its methods provides functionality for determining if variable's value meets specified conditions and throw exception if it's not.

NotNull

Throws ArgumentNullException when value of specified variable is null:

object myValue = null;
Ensure.NotNull(myValue, nameof(myValue)); // --> throws ArgumentNullException
myValue = "123456";
Ensure.NotNull(myValue, nameof(myValue)); // --> does nothing

NotEmpty

Throws ArgumentNullException when value of specified string variable is null or empty or consists only of white-space characters:

string? myValue = null;
Ensure.NotNull(myValue, nameof(myValue)); // --> throws ArgumentNullException
myValue = "        ";
Ensure.NotNull(myValue, nameof(myValue)); // --> throws ArgumentNullException
myValue = "abcdef";
Ensure.NotNull(myValue, nameof(myValue)); // --> does nothing

Other methods

Other methods to check variables are listed below:

• InRange

• GreaterThan

• LessThan

Each of them got three different versions for string, DateTime and IComparable values.