public void Add(object key, object value)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
if (!KeyType.IsInstanceOfType(key))
{
key = TypeDescriptor.GetConverter(KeyType).ConvertFrom(key);
}
if (key == null)
{
throw new ArgumentException("Key was converted to null.", nameof(key));
}
if (Dictionary.Contains(key))
{
Dictionary[key] = value;
}
else
{
Dictionary.Add(key, value);
}
}