in libraries/Client/DirectLineClient.cs [939:955]
public DirectLineClient(Uri baseUri, ServiceClientCredentials credentials, params DelegatingHandler[] handlers) : this(handlers)
{
if (baseUri == null)
{
throw new ArgumentNullException("baseUri");
}
if (credentials == null)
{
throw new ArgumentNullException("credentials");
}
this.BaseUri = baseUri;
this.Credentials = credentials;
if (this.Credentials != null)
{
this.Credentials.InitializeServiceClient(this);
}
}