/// <summary>
/// Deletes.
/// </summary>
/// <param name="a">Left element.</param>
/// <param name="b">Right element.</param>
/// <returns>The result.</returns>
public static StringKeyValuePairs operator -(StringKeyValuePairs a, KeyValuePair <string, string> b)
{
if (a == null)
{
return(null);
}
var col = new StringKeyValuePairs();
col.AddRange(a);
a.Remove(b.Key, b.Value);
return(col);
}
/// <summary>
/// Adds 2 elements.
/// </summary>
/// <param name="a">Left element.</param>
/// <param name="b">Right element.</param>
/// <returns>The result.</returns>
public static StringKeyValuePairs operator +(StringKeyValuePairs a, KeyValuePair <string, string> b)
{
if (a == null)
{
return(null);
}
var col = new StringKeyValuePairs();
if (a != null)
{
col.AddRange(a);
}
col.Add(b);
return(col);
}
/// <summary>
/// Adds 2 elements.
/// </summary>
/// <param name="a">Left element.</param>
/// <param name="b">Right element.</param>
/// <returns>The result.</returns>
public static StringKeyValuePairs operator +(StringKeyValuePairs a, IEnumerable <KeyValuePair <string, string> > b)
{
if (a == null && b == null)
{
return(null);
}
var col = new StringKeyValuePairs();
if (a != null)
{
col.AddRange(a);
}
if (b != null)
{
col.AddRange(b);
}
return(col);
}
/// <summary>
/// Deletes.
/// </summary>
/// <param name="a">Left element.</param>
/// <param name="b">Right element.</param>
/// <returns>The result.</returns>
public static StringKeyValuePairs operator -(StringKeyValuePairs a, IEnumerable <KeyValuePair <string, string> > b)
{
if (a == null)
{
return(null);
}
var col = new StringKeyValuePairs();
col.AddRange(a);
if (b == null)
{
return(col);
}
foreach (var kvp in b)
{
a.Remove(kvp.Key, kvp.Value);
}
return(col);
}