bool ICollection <KeyValuePair <string, string> > .Remove(KeyValuePair <string, string> item)
 => KvpCollection.Remove(item);
 bool ICollection <KeyValuePair <string, string> > .Contains(KeyValuePair <string, string> item)
 => KvpCollection.Contains(item);
 void ICollection <KeyValuePair <string, string> > .CopyTo(KeyValuePair <string, string>[] array, int arrayIndex)
 => KvpCollection.CopyTo(array, arrayIndex);
 void ICollection <KeyValuePair <string, string> > .Add(KeyValuePair <string, string> item)
 => KvpCollection.Add(item);