CRM 2015 Filtering Sample

filter-item-collection-1.cs

public abstract class FilterItemCollection : IFilterItemCollection
{
  protected FilterItemCollection(string filename)
  {
    this.Initialise(filename);
  }

  protected Filter Filter { get; set; }

  ...
  
  public bool IsValidEntity(string entityName)
  {
    var isValid = this.Filter
                      .Items
                      .Exists(p => p.Equals(entityName, StringComparison.InvariantCultureIgnoreCase));
    return isValid;
  }

  protected abstract void OnInitialising(string filename);

  private void Initialise(string filename)
  {
    this.OnInitialising(filename);
  }
}