Question

Can you tell me if TrimNull() is redundant and if I should be using an alternative?

For example:

string username = UsernameTextBox.Text.TrimNull();

I am told there is no definition or extension method. Perhaps there is a reference I am missing?

UPDATE:

What is the most readable way to return empty string if the value is NULL?

Answer 1

You could create your own extension-method for that, if you like:

public static class StringExtensions
{
    public static string TrimNull(this string value)
    {
        return string.IsNullOrWhiteSpace(value) ? value : value.Trim();
    }
}

Add this to your project and your code will work.

This is just an alternative.