This code checks whether the `Country` property of the `employeeModel`...

This code checks whether the Country property of the employeeModel object is not null, not empty, and not whitespace. If it passes this check, it sets the ForeignCountry property of the employeeAddress object to the value of the Country property from employeeModel.

Step-by-Step Explanation:

1. Condition Check:

   • !string.IsNullOrWhiteSpace(employeeModel.Country):
     • The method string.IsNullOrWhiteSpace checks if the employeeModel.Country property is:
       • null
       • An empty string ("")
       • A string containing only whitespace (e.g., " ").
     • The ! negates the result, so the condition evaluates to true if employeeModel.Country is not null, not empty, and has non-whitespace characters.

2. Assignment:

   • If the condition is true, employeeAddress.ForeignCountry is assigned the value of employeeModel.Country.

Summary:

This ensures that the ForeignCountry property of employeeAddress is only updated if the Country property in employeeModel is a valid, non-empty, non-whitespace string. Otherwise, no action is taken.