/// <summary>
/// Logically ORs multiple search conditions, meaning a message will be included in the search
/// result if it meets at least either of the conditions.
/// </summary>
/// <param name="other">A search condition to logically OR this MailSearchCriteria instance
/// with.</param>
/// <returns>A new MailSearchCriteria instance which can be further chained with other search
/// conditions.</returns>
/// <exception cref="ArgumentNullException">The other parameter is null.</exception>
public MailSearchCriteria Or(MailSearchCriteria other)
{
other.ThrowIfNull("other");
return(Join("OR", this, other));
}
/// <summary>
/// Logically ANDs multiple search conditions, meaning a message will only be included in the
/// search result if both of the ANDed conditions are met.
/// </summary>
/// <param name="other">A search condition to logically AND this MailSearchCriteria instance
/// with.</param>
/// <returns>A new MailSearchCriteria instance which can be further chained with other search
/// conditions.</returns>
/// <exception cref="ArgumentNullException">The other parameter is null.</exception>
public MailSearchCriteria And(MailSearchCriteria other)
{
other.ThrowIfNull("other");
return(Join(string.Empty, this, other));
}