DoesNotEndWith

public static bool DoesNotEndWith(this string input, string pattern)
{
   return string.IsNullOrEmpty(pattern) ||
            input.IsNullOrEmptyOrWhiteSpace() ||
            !input.EndsWith(pattern, StringComparison.CurrentCulture);
}
Example: 
Assert.IsTrue("Test".DoesNotEndWith('?'));

Description

It returns true if string does not end with the character otherwise returns false. If you pass null or empty string, false will be returned.

Details

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