Fixing compilation error

TeamCitySharp.sln

@@ -1,6 +1,8 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2012
+# Visual Studio 2013
+VisualStudioVersion = 12.0.30723.0
+MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Tests", "Tests", "{263F35DD-20C1-4209-B121-E962C9328C70}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TeamCitySharp.IntegrationTests", "src\Tests\IntegrationTests\TeamCitySharp.IntegrationTests.csproj", "{BA409A09-CC7B-4A71-A3D4-FE27234A721B}"

src/TeamCitySharp/ActionTypes/Builds.cs

@@ -101,6 +101,12 @@ public List<Build> ByBuildConfigId(string buildConfigId)
                                             ));
         }
 
+        public List<Build> AllRunningBuilds()
+        {
+            return ByBuildLocator(BuildLocator.WithDimensions(null, null, null, null, null, null, true
+                                            ));
+        }
+
         public List<Build> ByConfigIdAndTag(string buildConfigId, string tag)
         {
             return ByConfigIdAndTag(buildConfigId, new[] { tag });

src/TeamCitySharp/ActionTypes/IBuilds.cs

@@ -18,6 +18,7 @@ public interface IBuilds
         List<Build> ByConfigIdAndTag(string buildConfigId, string tag);
         List<Build> ByUserName(string userName);
         List<Build> ByBuildLocator(BuildLocator locator);
+        List<Build> AllRunningBuilds();
         List<Build> AllSinceDate(DateTime date);
         List<Build> AllBuildsOfStatusSinceDate(DateTime date, BuildStatus buildStatus);
         List<Build> NonSuccessfulBuildsForUser(string userName);

src/TeamCitySharp/Connection/TeamCityCaller.cs

@@ -2,7 +2,8 @@
 using System.IO;
 using System.Net;
 using System.Security.Authentication;
-using EasyHttp.Http;
+using System.Web;
+using EasyHttp.Http;
 using TeamCitySharp.DomainEntities;
 using File = System.IO.File;
 using HttpException = EasyHttp.Infrastructure.HttpException;
@@ -67,7 +68,7 @@ public void GetDownloadFormat(Action<string> downloadHandler, string urlPart, pa
                 throw new ArgumentException("If you are not acting as a guest you must supply userName and password");
             }
 
-            urlPart = System.Web.HttpUtility.UrlEncode(urlPart);
+            urlPart = HttpUtility.UrlEncode(urlPart);
             if (string.IsNullOrEmpty(urlPart))
             {
                 throw new ArgumentException("Url must be specfied");

src/TeamCitySharp/TeamCitySharp.csproj

@@ -42,6 +42,7 @@
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Core" />
+    <Reference Include="System.Web" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />