/// <summary>
 /// Get adoxio_enforcementaction_Letters from adoxio_enforcementactions
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='adoxioEnforcementactionid'>
 /// key: adoxio_enforcementactionid of adoxio_enforcementaction
 /// </param>
 /// <param name='activityid'>
 /// key: activityid of letter
 /// </param>
 /// <param name='select'>
 /// Select properties to be returned
 /// </param>
 /// <param name='expand'>
 /// Expand related entities
 /// </param>
 /// <param name='cancellationToken'>
 /// The cancellation token.
 /// </param>
 public static async Task <MicrosoftDynamicsCRMletter> LettersByKeyAsync(this IEnforcementactionletters operations, string adoxioEnforcementactionid, string activityid, IList <string> select = default(IList <string>), IList <string> expand = default(IList <string>), CancellationToken cancellationToken = default(CancellationToken))
 {
     using (var _result = await operations.LettersByKeyWithHttpMessagesAsync(adoxioEnforcementactionid, activityid, select, expand, null, cancellationToken).ConfigureAwait(false))
     {
         return(_result.Body);
     }
 }
 /// <summary>
 /// Get adoxio_enforcementaction_Letters from adoxio_enforcementactions
 /// </summary>
 /// <param name='operations'>
 /// The operations group for this extension method.
 /// </param>
 /// <param name='adoxioEnforcementactionid'>
 /// key: adoxio_enforcementactionid of adoxio_enforcementaction
 /// </param>
 /// <param name='activityid'>
 /// key: activityid of letter
 /// </param>
 /// <param name='select'>
 /// Select properties to be returned
 /// </param>
 /// <param name='expand'>
 /// Expand related entities
 /// </param>
 /// <param name='customHeaders'>
 /// Headers that will be added to request.
 /// </param>
 public static HttpOperationResponse <MicrosoftDynamicsCRMletter> LettersByKeyWithHttpMessages(this IEnforcementactionletters operations, string adoxioEnforcementactionid, string activityid, IList <string> select = default(IList <string>), IList <string> expand = default(IList <string>), Dictionary <string, List <string> > customHeaders = null)
 {
     return(operations.LettersByKeyWithHttpMessagesAsync(adoxioEnforcementactionid, activityid, select, expand, customHeaders, CancellationToken.None).ConfigureAwait(false).GetAwaiter().GetResult());
 }