HeaderCollection.cs

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using System.Collections.Specialized;
using System.Net.Mail;
using System.Text;
 
namespace System.Net.Mime;
 
internal sealed class HeaderCollection : NameValueCollection
{
    internal HeaderCollection()
        : base(StringComparer.OrdinalIgnoreCase)
    {
    }
 
    public override void Remove(string name)
    {
        if (name == null)
        {
            throw new ArgumentNullException("name");
        }
        if (name.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "name"), "name");
        }
        base.Remove(name);
    }
 
    public override string Get(string name)
    {
        if (name == null)
        {
            throw new ArgumentNullException("name");
        }
        if (name.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "name"), "name");
        }
        return base.Get(name);
    }
 
    public override string[] GetValues(string name)
    {
        if (name == null)
        {
            throw new ArgumentNullException("name");
        }
        if (name.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "name"), "name");
        }
        return base.GetValues(name);
    }
 
    internal void InternalRemove(string name)
    {
        base.Remove(name);
    }
 
    internal void InternalSet(string name, string value)
    {
        base.Set(name, value);
    }
 
    internal void InternalAdd(string name, string value)
    {
        if (MailHeaderInfo.IsSingleton(name))
        {
            base.Set(name, value);
        }
        else
        {
            base.Add(name, value);
        }
    }
 
    public override void Set(string name, string value)
    {
        if (name == null)
        {
            throw new ArgumentNullException("name");
        }
        if (value == null)
        {
            throw new ArgumentNullException("value");
        }
        if (name.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "name"), "name");
        }
        if (value.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "value"), "value");
        }
        if (!MimeBasePart.IsAscii(name, permitCROrLF: false))
        {
            throw new FormatException(System.SR.InvalidHeaderName);
        }
        name = MailHeaderInfo.NormalizeCase(name);
        value = value.Normalize(NormalizationForm.FormC);
        base.Set(name, value);
    }
 
    public override void Add(string name, string value)
    {
        if (name == null)
        {
            throw new ArgumentNullException("name");
        }
        if (value == null)
        {
            throw new ArgumentNullException("value");
        }
        if (name.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "name"), "name");
        }
        if (value.Length == 0)
        {
            throw new ArgumentException(System.SR.Format(System.SR.net_emptystringcall, "value"), "value");
        }
        MailBnfHelper.ValidateHeaderName(name);
        name = MailHeaderInfo.NormalizeCase(name);
        value = value.Normalize(NormalizationForm.FormC);
        InternalAdd(name, value);
    }
}