/// <summary>
/// Adds an element with the provided key and value to the <see cref="T:System.Collections.Generic.ICollection`1"/>.
/// </summary>
/// <param name="key">The object to use as the key of the element to add.</param><param name="value">The object to use as the value of the element to add.</param><exception cref="T:System.ArgumentNullException"><paramref name="key"/> is null.</exception>
/// <exception cref="T:System.ArgumentException">An element with the same key already exists in the <see cref="T:System.Collections.Generic.ICollection`1"/>.</exception><exception cref="T:System.NotSupportedException">The <see cref="T:System.Collections.Generic.ICollection`1"/> is read-only.</exception>
public void Add(string key, ODataValue value)
{
ODataInstanceAnnotation.ValidateName(key);
ODataInstanceAnnotation.ValidateValue(value);
this.inner.Add(key, value);
}