CRM Service Exception: Could not load file or assembly 'Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies

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I received the below error from a CRM WCF service that I created.  After some investigating, I found out that I received this error because I don't have Windows Identify Foundation Pack installed on my developer PC. After installing Windows Identity Foundation, the service ran as expected.

Be sure to install 6.0 if you're running Vista and 6.1 if you're running Windows 7.

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System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified. File name: 'Microsoft.IdentityModel, Version=3.5.0.0, Culture=neutral, PublicKey
Token=31bf3856ad364e35'
at Microsoft.Xrm.Sdk.Client.ServiceConfiguration`1.CreateLocalChannelFactory()
at Microsoft.Xrm.Sdk.Client.ServiceConfiguration`1.CreateChannelFactory(ClientCredentials clientCredentials)
at Microsoft.Xrm.Sdk.Client.OrganizationServiceConfiguration.CreateChannelFactory(ClientCredentials clientCredentials)
at Microsoft.Xrm.Sdk.Client.ServiceProxy`1.get_ChannelFactory()
at Microsoft.Xrm.Sdk.Client.ServiceProxy`1.CreateNewServiceChannel()
at Microsoft.Xrm.Sdk.Client.ServiceProxy`1.ValidateAuthentication()
at Microsoft.Xrm.Sdk.Client.ServiceProxy`1.get_ServiceChannel()
at Microsoft.Xrm.Sdk.Client.ServiceContextInitializer`1.Initialize(ServiceProxy`1 proxy)
at Microsoft.Xrm.Sdk.Client.ServiceContextInitializer`1..ctor(ServiceProxy`1proxy)
at Microsoft.Xrm.Sdk.Client.OrganizationServiceContextInitializer..ctor(OrganizationServiceProxy proxy)
at Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy.ExecuteCore(OrganizationRequest request)
at Microsoft.Xrm.Sdk.Client.OrganizationServiceProxy.Execute(OrganizationRequest request)
at Microsoft.Xrm.Sdk.Client.OrganizationServiceContext.Execute(OrganizationRequest request)
at Microsoft.Xrm.Sdk.Linq.QueryProvider.RetrieveEntityCollection(OrganizationRequest request, NavigationSource source)
at Microsoft.Xrm.Sdk.Linq.QueryProvider.Execute(QueryExpression qe, Boolean throwIfSequenceIsEmpty, Boolean throwIfSequenceNotSingle, Projection projection, NavigationSource source, List`1 linkLookups, String& pagingCookie, Boolean& more Records)
at Microsoft.Xrm.Sdk.Linq.QueryProvider.Execute[TElement](QueryExpression qe, Boolean throwIfSequenceIsEmpty, Boolean throwIfSequenceNotSingle, Projection projection, NavigationSource source, List`1 linkLookups)
at Microsoft.Xrm.Sdk.Linq.QueryProvider.Execute[TElement](Expression expression)
at Microsoft.Xrm.Sdk.Linq.QueryProvider.GetEnumerator[TElement](Expression expression)
at Microsoft.Xrm.Sdk.Linq.Query`1.GetEnumerator()
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Irpc.Crm.Services.Common.ReportedIssueService.GetReportedIssues(Guid pcmReportId) in C:\IRPC\Source\Irpc.Crm\Services\Irpc.Crm.Services.Common\ReportedIssueService.svc.cs:line 31
at CommonServiceTester.Program.TestReportedIssueServiceGet(ReportedIssueService service) in C:\IRPC\Source\Irpc.Crm\Test\CommonServiceTester\Program.cs:line309
at CommonServiceTester.Program.Main(String[] args) in C:\IRPC\Source\Irpc.Crm\Test\CommonServiceTester\Program.cs:line 42