RequestOptions
Options that can be used to control the behavior of a request sent by a client.
            
                
Gets or sets a value indicating whether the response content should be
            buffered in-memory by the pipeline. This value defaults to true.
            
Gets or sets the  CancellationToken used for the duration
            of the call to  Send.
            
Gets or sets a value that describes when a client's service method will
            raise an exception if the underlying response is considered an error.
            
public RequestOptions()
Initializes a new instance of the  RequestOptions class
            
Adds the specified header and its value to the request's header
            collection. If a header with this name is already present in the
            collection, the value will be added to the comma-separated list of
            values associated with the header.
            
Adds a  PipelinePolicy into the pipeline for the duration
            of this request.
            
Assert that  Freeze has not been called on this
             RequestOptions instance.
            
Freeze this instance of  RequestOptions.  After this method
            has been called, any attempt to set properties on the instance or call
            methods that would change its state will throw  InvalidOperationException.
            
Sets the specified header and its value in the request's header
            collection. If a header with this name is already present in the
            collection, the header's value will be replaced with the specified value.