/// <summary>
/// Constructs the uri by appending OAuth authorization query string and additional query parameters.
/// </summary>
/// <returns></returns>
protected override string ConstructUri()
{
if (this.accessToken == null)
{
Environment.ValidateAccessToken();
}
var uri = Uri;
var oAuthQueryString = OAuthHelper.ConstructQueryString(CollectAllParams());
uri += "?" + oAuthQueryString;
return(uri);
}