问AssetNotFoundException in SharpDX

EN

public Texture2D tulTexture;
//...
protected override void LoadContent()
{
    // Instantiate a SpriteBatch
    spriteBatch = ToDisposeContent(new SpriteBatch(GraphicsDevice));

    // Loads the balls texture (32 textures (32x32) stored vertically => 32 x 1024 ).
    // The [Balls.dds] file is defined with the build action [ToolkitTexture] in the project
    tulTexture = this.Content.Load<Texture2D>("T.jpg");

    // Loads a sprite font
    // The [Arial16.xml] file is defined with the build action [ToolkitFont] in the project


    base.LoadContent();
}