/// <summary>
/// Returns the current value of a property given a notification that
/// it has changed.
/// </summary>
/// <returns>The current value of the property</returns>
public static TValue GetValue <TSender, TValue>(this IObservedChange <TSender, TValue> This)
{
TValue ret;
if (!This.TryGetValue(out ret))
{
throw new Exception($"One of the properties in the expression '{This.GetPropertyName()}' was null");
}
return(ret);
}
/// <summary>
/// Returns the current value of a property given a notification that
/// it has changed.
/// </summary>
/// <typeparam name="TSender">The sender.</typeparam>
/// <typeparam name="TValue">The changed value.</typeparam>
/// <param name="item">
/// The <see cref="IObservedChange{TSender, TValue}"/> instance to get the value of.
/// </param>
/// <returns>
/// The current value of the property.
/// </returns>
public static TValue GetValue <TSender, TValue>(this IObservedChange <TSender, TValue> item)
{
if (item is null)
{
throw new ArgumentNullException(nameof(item));
}
if (!item.TryGetValue(out var returnValue))
{
throw new Exception($"One of the properties in the expression '{item.GetPropertyName()}' was null");
}
return(returnValue);
}
