使用Silverlight Toolkit绘制图表(上)－－柱状图

而数据源是在程序中直接写死的，如下：

/**//// <summary>
/// City business object used for charting samples.
/// </summary>
public class City
{
　　/**//// <summary>
　　/// Gets or sets the name of the city.
　　/// </summary>
　　public int ID { get; set; }
　　
　　/**//// <summary>
　　/// Gets or sets the name of the city.
　　/// </summary>
　　public string Name { get; set; }
　　
　　/**//// <summary>
　　/// Gets or sets the population of the city.
　　/// </summary>
　　public int Population { get; set; }
　　
　　/**//// <summary>
　　/// Initializes a new instance of the City class.
　　/// </summary>
　　public City()
　　{
　　}
　　
　　/**//// <summary>
　　/// Returns a string that represents the current object.
　　/// </summary>
　　/// <returns>A string that represents the current object.</returns>
　　public override string ToString()
　　{
　　　　return Name;
　　}
　　
　　/**//// <summary>
　　/// Gets a collection of cities in the Puget Sound area.
　　/// </summary>
　　public static ObjectCollection PugetSound
　　{
　　　　get
　　　　{
　　　　　　ObjectCollection pugetSound = new ObjectCollection();
　　　　　　pugetSound.Add(new City { Name = "张庄", Population = 312344, ID = 1 });
　　　　　　pugetSound.Add(new City { Name = "李庄", Population = 411212, ID = 2 });
　　　　　　pugetSound.Add(new City { Name = "赵庄", Population = 261391, ID = 3 });
　　　　　　pugetSound.Add(new City { Name = "马家河子", Population = 530022, ID = 4 });
　　　　　　return pugetSound;
　　　　}
　　}
}