Code inspection: Parameter is only used for precondition check (non-private accessibility)

This inspection reports a parameter when it is only used for validation or guard clauses and never used afterwards. That often means the value should be stored in a field or property, or the parameter should be removed.

Example

class Customer
{
    public Customer(object value)
    {
        if (value == null) throw new Exception();
    }
}
            

class Customer
{
    private readonly object myValue;
    public Customer(object value)
    {
        if (value == null) throw new Exception();
        myValue = value;
    }
}
            

Quick-fix

Either use the parameter value later in the method (e.g., store it in a field) or remove the parameter if the check is unnecessary.

13 April 2026