Crud Class

public interface ICrud 
 { 
    // Gets a boolean value indicating whether the external store addin is to store to the local store (true) or directly to the external store (false) 
    bool StoreLocal 
    { 
       get; 
    } 
    // Gets a string representing the GUID (globally unique identifier) associated with this external store add-in 
    string ExternalStoreGuid 
    { 
       get; 
    } 
    // Gets the friendly name for this external store add-in 
    string FriendlyName 
    { 
       get; 
    } 
    //  Called by the PACSFramework so that external store add-in can perform any required initialization 
    void Initialize(); 
    // Called by the PACSFramework when the external store settings change for any external store addin through the CSStorageServerManager UI 
    // This is used to notify the external store addins to re-read the external store settings 
    void SettingsChanged(); 
    // Called by the PACSFramework so that the external store addin can store the local file 'filename' to the external store 
    // if 'overwrite' is true, then overwrite any existing file that exists in the external store; otherwise, do nothing and return null. 
    // Return null if successful; otherwise return an appropriate exception. 
    Exception Store(string filename, bool overwrite, out string token); 
    // Called by the PACSFramework so that the external store addin can store 'dataset' to the external store 
    Exception StoreDicom(string filename, DicomDataSet dataset, DicomDataSetSaveFlags saveFlags, bool overwrite, out string token); 
    // Called by the PACSFramework so that the external store addin can update 'dataset' on the external store 
    Exception UpdateDicom(DataRow row, DicomDataSet dataset, DicomDataSetSaveFlags saveFlags); 
    // Called by the PACSFramework to retrieve the file specified by 'row' from the external store to the local store 
    Exception RetrieveFile(DataRow row, string outFile); 
    // Called by the PACSFramework to retrieve the DicomDataSet specified by 'row' from the external store to the local store 
    Exception RetrieveDicom(DataRow row, DicomDataSetLoadFlags loadFlags, out DicomDataSet dataset); 
    // Called by the PACSFramework to delete the DicomDataSet from the external store that corresponds to 'token' 
    Exception Delete(string token); 
    // Called by the PACSFramework to delete the DicomDataSet specified by 'row' from the external store 
    Exception DeleteDicom(DataRow row); 
    // Called by the PACSFramework to determine if the file that corresponds to 'token' exists on the external store 
    Exception Exists(string token, out bool exists); 
    // Called by the PACSFramework to determine if the DicomDataSet specified by 'row' exists on the external store 
    Exception ExistsDicom(DataRow row, out bool exists); 
 }