title: Fixing the No overload for method problem
body: <p>I am keep having the "No overload for method 'GenerateSignature' takes 9 arguments" problem. Can you please tell me what is wrong with this class.
  This code is the sample from the Oauth.net . I think it too old for my asp.net 3.5 or 4.0.</p>
  
  <p>default.aspx</p>
  
  <pre><code>&lt;%@ Page Language="C#" AutoEventWireup="true"%&gt;
  &lt;%@ Import Namespace="OAuth" %&gt;
  &lt;%@ Import Namespace="System" %&gt;
  &lt;%@ Import Namespace="System.Net" %&gt;
  &lt;%@ Import Namespace="System.IO" %&gt;
  &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt;
  
  &lt;html xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head runat="server"&gt;
      &lt;title&gt;&lt;/title&gt;
  &lt;/head&gt;
  &lt;body&gt;
      &lt;form id="form1" runat="server"&gt;
      &lt;div&gt;
      &lt;%
  OAuthBase oauth = new OAuthBase();
  Uri url = new Uri("http://ssdsdafdasfdsafdsa.example.net/photos?file=vacation.jpg&amp;size=original");
  string signature = oauth.GenerateSignature(url,"dpf43f3p2l4k3l03", "kd94hf93k423kf44", "nnch734d00sl2jdk", "pfkkdhi9sl3r4s00", "GET", oauth.GenerateTimeStamp(), oauth.GenerateNonce(), OAuthBase.SignatureTypes.HMACSHA1);
           %&gt;
      &lt;/div&gt;
      &lt;/form&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>The app_code
  //THE APP_CODE</p>
  
  <pre><code>using System;
  using System.Security.Cryptography;
  using System.Collections.Generic;
  using System.Text;
  using System.Web;
  
  namespace OAuth {
      public class OAuthBase {
          /// &lt;summary&gt;
          /// Provides a predefined set of algorithms that are supported officially by the protocol
          /// &lt;/summary&gt;
          public enum SignatureTypes {
              HMACSHA1,
              PLAINTEXT,
              RSASHA1
          }
  
          /// &lt;summary&gt;
          /// Provides an internal structure to sort the query parameter
          /// &lt;/summary&gt;
          protected class QueryParameter {
              private string name = null;
              private string value = null;
  
              public QueryParameter(string name, string value) {
                  this.name = name;
                  this.value = value;
              }
  
              public string Name {
                  get { return name; }
              }
  
              public string Value {
                  get { return value; }
              }            
          }
  
          /// &lt;summary&gt;
          /// Comparer class used to perform the sorting of the query parameters
          /// &lt;/summary&gt;
          protected class QueryParameterComparer : IComparer&lt;QueryParameter&gt; {
  
              #region IComparer&lt;QueryParameter&gt; Members
  
              public int Compare(QueryParameter x, QueryParameter y) {
                  if (x.Name == y.Name) {
                      return string.Compare(x.Value, y.Value);
                  } else {
                      return string.Compare(x.Name, y.Name);
                  }
              }
  
              #endregion
          }
  
          protected const string OAuthVersion = "1.0";
          protected const string OAuthParameterPrefix = "oauth_";
  
          //
          // List of know and used oauth parameters' names
          //        
          protected const string OAuthConsumerKeyKey = "oauth_consumer_key";
          protected const string OAuthCallbackKey = "oauth_callback";
          protected const string OAuthVersionKey = "oauth_version";
          protected const string OAuthSignatureMethodKey = "oauth_signature_method";
          protected const string OAuthSignatureKey = "oauth_signature";
          protected const string OAuthTimestampKey = "oauth_timestamp";
          protected const string OAuthNonceKey = "oauth_nonce";
          protected const string OAuthTokenKey = "oauth_token";
          protected const string OAuthTokenSecretKey = "oauth_token_secret";
  
          protected const string HMACSHA1SignatureType = "HMAC-SHA1";
          protected const string PlainTextSignatureType = "PLAINTEXT";
          protected const string RSASHA1SignatureType = "RSA-SHA1";
  
          protected Random random = new Random();
  
          protected string unreservedChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_.~";
  
          /// &lt;summary&gt;
          /// Helper function to compute a hash value
          /// &lt;/summary&gt;
          /// &lt;param name="hashAlgorithm"&gt;The hashing algoirhtm used. If that algorithm needs some initialization, like HMAC and its derivatives, they should be initialized prior to passing it to this function&lt;/param&gt;
          /// &lt;param name="data"&gt;The data to hash&lt;/param&gt;
          /// &lt;returns&gt;a Base64 string of the hash value&lt;/returns&gt;
          private string ComputeHash(HashAlgorithm hashAlgorithm, string data) {
              if (hashAlgorithm == null) {
                  throw new ArgumentNullException("hashAlgorithm");
              }
  
              if (string.IsNullOrEmpty(data)) {
                  throw new ArgumentNullException("data");
              }
  
              byte[] dataBuffer = System.Text.Encoding.ASCII.GetBytes(data);
              byte[] hashBytes = hashAlgorithm.ComputeHash(dataBuffer);
  
              return Convert.ToBase64String(hashBytes);
          }
  
          /// &lt;summary&gt;
          /// Internal function to cut out all non oauth query string parameters (all parameters not begining with "oauth_")
          /// &lt;/summary&gt;
          /// &lt;param name="parameters"&gt;The query string part of the Url&lt;/param&gt;
          /// &lt;returns&gt;A list of QueryParameter each containing the parameter name and value&lt;/returns&gt;
          private List&lt;QueryParameter&gt; GetQueryParameters(string parameters) {
              if (parameters.StartsWith("?")) {
                  parameters = parameters.Remove(0, 1);
              }
  
              List&lt;QueryParameter&gt; result = new List&lt;QueryParameter&gt;();
  
              if (!string.IsNullOrEmpty(parameters)) {
                  string[] p = parameters.Split('&amp;');
                  foreach (string s in p) {
                      if (!string.IsNullOrEmpty(s) &amp;&amp; !s.StartsWith(OAuthParameterPrefix)) {
                          if (s.IndexOf('=') &gt; -1) {
                              string[] temp = s.Split('=');
                              result.Add(new QueryParameter(temp[0], temp[1]));
                          } else {
                              result.Add(new QueryParameter(s, string.Empty));
                          }
                      }
                  }
              }
  
              return result;
          }
  
          /// &lt;summary&gt;
          /// This is a different Url Encode implementation since the default .NET one outputs the percent encoding in lower case.
          /// While this is not a problem with the percent encoding spec, it is used in upper case throughout OAuth
          /// &lt;/summary&gt;
          /// &lt;param name="value"&gt;The value to Url encode&lt;/param&gt;
          /// &lt;returns&gt;Returns a Url encoded string&lt;/returns&gt;
          protected string UrlEncode(string value) {
              StringBuilder result = new StringBuilder();
  
              foreach (char symbol in value) {
                  if (unreservedChars.IndexOf(symbol) != -1) {
                      result.Append(symbol);
                  } else {
                      result.Append('%' + String.Format("{0:X2}", (int)symbol));
                  }
              }
  
              return result.ToString();
          }
  
          /// &lt;summary&gt;
          /// Normalizes the request parameters according to the spec
          /// &lt;/summary&gt;
          /// &lt;param name="parameters"&gt;The list of parameters already sorted&lt;/param&gt;
          /// &lt;returns&gt;a string representing the normalized parameters&lt;/returns&gt;
          protected string NormalizeRequestParameters(IList&lt;QueryParameter&gt; parameters) {         
              StringBuilder sb = new StringBuilder();
              QueryParameter p = null;
              for (int i = 0; i &lt; parameters.Count; i++) {
                  p = parameters[i];
                  sb.AppendFormat("{0}={1}", p.Name, p.Value);
  
                  if (i &lt; parameters.Count - 1) {
                      sb.Append("&amp;");
                  }
              }
  
              return sb.ToString();
          }
  
          /// &lt;summary&gt;
          /// Generate the signature base that is used to produce the signature
          /// &lt;/summary&gt;
          /// &lt;param name="url"&gt;The full url that needs to be signed including its non OAuth url parameters&lt;/param&gt;
          /// &lt;param name="consumerKey"&gt;The consumer key&lt;/param&gt;        
          /// &lt;param name="token"&gt;The token, if available. If not available pass null or an empty string&lt;/param&gt;
          /// &lt;param name="tokenSecret"&gt;The token secret, if available. If not available pass null or an empty string&lt;/param&gt;
          /// &lt;param name="httpMethod"&gt;The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)&lt;/param&gt;
          /// &lt;param name="signatureType"&gt;The signature type. To use the default values use &lt;see cref="OAuthBase.SignatureTypes"&gt;OAuthBase.SignatureTypes&lt;/see&gt;.&lt;/param&gt;
          /// &lt;returns&gt;The signature base&lt;/returns&gt;
          public string GenerateSignatureBase(Uri url, string consumerKey, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, string signatureType, out string normalizedUrl, out string normalizedRequestParameters) {
              if (token == null) {
                  token = string.Empty;
              }
  
              if (tokenSecret == null) {
                  tokenSecret = string.Empty;
              }
  
              if (string.IsNullOrEmpty(consumerKey)) {
                  throw new ArgumentNullException("consumerKey");
              }
  
              if (string.IsNullOrEmpty(httpMethod)) {
                  throw new ArgumentNullException("httpMethod");
              }
  
              if (string.IsNullOrEmpty(signatureType)) {
                  throw new ArgumentNullException("signatureType");
              }
  
              normalizedUrl = null;
              normalizedRequestParameters = null;
  
              List&lt;QueryParameter&gt; parameters = GetQueryParameters(url.Query);
              parameters.Add(new QueryParameter(OAuthVersionKey, OAuthVersion));
              parameters.Add(new QueryParameter(OAuthNonceKey, nonce));
              parameters.Add(new QueryParameter(OAuthTimestampKey, timeStamp));
              parameters.Add(new QueryParameter(OAuthSignatureMethodKey, signatureType));
              parameters.Add(new QueryParameter(OAuthConsumerKeyKey, consumerKey));
  
              if (!string.IsNullOrEmpty(token)) {
                  parameters.Add(new QueryParameter(OAuthTokenKey, token));
              }
  
              parameters.Sort(new QueryParameterComparer());
  
              normalizedUrl = string.Format("{0}://{1}", url.Scheme, url.Host);
              if (!((url.Scheme == "http" &amp;&amp; url.Port == 80) || (url.Scheme == "https" &amp;&amp; url.Port == 443)))
              {
                  normalizedUrl += ":" + url.Port;
              }
              normalizedUrl += url.AbsolutePath;
              normalizedRequestParameters = NormalizeRequestParameters(parameters);
  
              StringBuilder signatureBase = new StringBuilder();          
              signatureBase.AppendFormat("{0}&amp;", httpMethod.ToUpper());
              signatureBase.AppendFormat("{0}&amp;", UrlEncode(normalizedUrl));
              signatureBase.AppendFormat("{0}", UrlEncode(normalizedRequestParameters));
  
              return signatureBase.ToString();
          }
  
          /// &lt;summary&gt;
          /// Generate the signature value based on the given signature base and hash algorithm
          /// &lt;/summary&gt;
          /// &lt;param name="signatureBase"&gt;The signature based as produced by the GenerateSignatureBase method or by any other means&lt;/param&gt;
          /// &lt;param name="hash"&gt;The hash algorithm used to perform the hashing. If the hashing algorithm requires initialization or a key it should be set prior to calling this method&lt;/param&gt;
          /// &lt;returns&gt;A base64 string of the hash value&lt;/returns&gt;
          public string GenerateSignatureUsingHash(string signatureBase, HashAlgorithm hash) {
              return ComputeHash(hash, signatureBase);
          }
  
          /// &lt;summary&gt;
          /// Generates a signature using the HMAC-SHA1 algorithm
          /// &lt;/summary&gt;      
          /// &lt;param name="url"&gt;The full url that needs to be signed including its non OAuth url parameters&lt;/param&gt;
          /// &lt;param name="consumerKey"&gt;The consumer key&lt;/param&gt;
          /// &lt;param name="consumerSecret"&gt;The consumer seceret&lt;/param&gt;
          /// &lt;param name="token"&gt;The token, if available. If not available pass null or an empty string&lt;/param&gt;
          /// &lt;param name="tokenSecret"&gt;The token secret, if available. If not available pass null or an empty string&lt;/param&gt;
          /// &lt;param name="httpMethod"&gt;The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)&lt;/param&gt;
          /// &lt;returns&gt;A base64 string of the hash value&lt;/returns&gt;
          public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, out string normalizedUrl, out string normalizedRequestParameters) {            
              return GenerateSignature(url, consumerKey, consumerSecret, token, tokenSecret, httpMethod, timeStamp, nonce, SignatureTypes.HMACSHA1, out normalizedUrl, out normalizedRequestParameters);
          }
  
          /// &lt;summary&gt;
          /// Generates a signature using the specified signatureType 
          /// &lt;/summary&gt;      
          /// &lt;param name="url"&gt;The full url that needs to be signed including its non OAuth url parameters&lt;/param&gt;
          /// &lt;param name="consumerKey"&gt;The consumer key&lt;/param&gt;
          /// &lt;param name="consumerSecret"&gt;The consumer seceret&lt;/param&gt;
          /// &lt;param name="token"&gt;The token, if available. If not available pass null or an empty string&lt;/param&gt;
          /// &lt;param name="tokenSecret"&gt;The token secret, if available. If not available pass null or an empty string&lt;/param&gt;
          /// &lt;param name="httpMethod"&gt;The http method used. Must be a valid HTTP method verb (POST,GET,PUT, etc)&lt;/param&gt;
          /// &lt;param name="signatureType"&gt;The type of signature to use&lt;/param&gt;
          /// &lt;returns&gt;A base64 string of the hash value&lt;/returns&gt;
          public string GenerateSignature(Uri url, string consumerKey, string consumerSecret, string token, string tokenSecret, string httpMethod, string timeStamp, string nonce, SignatureTypes signatureType, out string normalizedUrl, out string normalizedRequestParameters) {
              normalizedUrl = null;
              normalizedRequestParameters = null;
  
              switch (signatureType) {
                  case SignatureTypes.PLAINTEXT:                  
                      return HttpUtility.UrlEncode(string.Format("{0}&amp;{1}", consumerSecret, tokenSecret));
                  case SignatureTypes.HMACSHA1:                   
                      string signatureBase = GenerateSignatureBase(url, consumerKey, token, tokenSecret, httpMethod, timeStamp, nonce, HMACSHA1SignatureType, out normalizedUrl, out normalizedRequestParameters);
  
                      HMACSHA1 hmacsha1 = new HMACSHA1();
                      hmacsha1.Key = Encoding.ASCII.GetBytes(string.Format("{0}&amp;{1}", UrlEncode(consumerSecret), string.IsNullOrEmpty(tokenSecret) ? "" : UrlEncode(tokenSecret)));
  
                      return GenerateSignatureUsingHash(signatureBase, hmacsha1);                                        
                  case SignatureTypes.RSASHA1:
                      throw new NotImplementedException();
                  default:
                      throw new ArgumentException("Unknown signature type", "signatureType");
              }
          }
  
          /// &lt;summary&gt;
          /// Generate the timestamp for the signature        
          /// &lt;/summary&gt;
          /// &lt;returns&gt;&lt;/returns&gt;
          public virtual string GenerateTimeStamp() {
              // Default implementation of UNIX time of the current UTC time
              TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
              return Convert.ToInt64(ts.TotalSeconds).ToString();            
          }
  
          /// &lt;summary&gt;
          /// Generate a nonce
          /// &lt;/summary&gt;
          /// &lt;returns&gt;&lt;/returns&gt;
          public virtual string GenerateNonce() {
              // Just a simple implementation of a random number between 123400 and 9999999
              return random.Next(123400, 9999999).ToString();            
          }
  
      }
  }
  </code></pre>