Lazy Loading of Objects

Lazy loading of objects essentially means that the data is loaded only when requested and not when the object instance is created.

For Eg. suppose we have a Blog class which has a blogText property. Now this property can be encapsulated like so.

public string BlogText
{
    get
    {
        if (blogText == null)
            blogText = SiteProvider.Blogs.GetBlogBody(Id);
        return blogText;

    }
    set { blogText = value; }
}

Here the BlogText property implements the lazy load pattern which means that the blogText field is retrieved only when it’s being accessed by another class. Hence if this property is not accessed from anywhere then the data will not be read from the database. Once the data is retrieved it will be held in memory for subsequent requests, hence i am checking if the value is null, if not then only hit the database and get the value.