Unwraps exceptions to the specified exception type

ExceptionExtensions.cs

public static class ExceptionExtensions
{
    public static TException Unwrap<TException>(this Exception exception) where TException : Exception
    {
        for (; exception != null; exception = exception.InnerException)
        {
            var typedException = exception as TException;
            if (typedException != null)
            {
                return typedException;
            }
        }

        return null;
    }
}