private void ValidateConfiguration(ApplicationTypeContext context)
        {
            Dictionary <string, IEnumerable <ConfigPackage> > configurationPackageDictionary = new Dictionary <string, IEnumerable <ConfigPackage> >();

            foreach (var serviceManifest in context.ServiceManifests)
            {
                configurationPackageDictionary.Add(serviceManifest.ServiceManifestType.Name, serviceManifest.ConfigPackages);
            }

            ApplicationManifestTypeServiceManifestImport[] serviceManifestImports = context.ApplicationManifest.ServiceManifestImport;
            bool hasEncryptedParameter = false;

            foreach (KeyValuePair <string, IEnumerable <ConfigPackage> > configKeyValuePair in configurationPackageDictionary)
            {
                if (configKeyValuePair.Value != null)
                {
                    ApplicationManifestTypeServiceManifestImport matchingServiceManifestImport = serviceManifestImports.FirstOrDefault <ApplicationManifestTypeServiceManifestImport>(
                        serviceManifestImport => ImageBuilderUtility.Equals(serviceManifestImport.ServiceManifestRef.ServiceManifestName, configKeyValuePair.Key));

                    ReleaseAssert.AssertIf(
                        matchingServiceManifestImport == null,
                        "Could not find matching ServiceManifest with Name {0}",
                        configKeyValuePair.Key);

                    foreach (ConfigPackage configurationPackage in configKeyValuePair.Value)
                    {
                        ImageBuilder.TraceSource.WriteInfo(
                            TraceType,
                            "Validating the configuration. ApplicationTypeName:{0}, ServiceManifestName:{1}, ConfigPackageName:{2}",
                            context.ApplicationManifest.ApplicationTypeName,
                            matchingServiceManifestImport.ServiceManifestRef.ServiceManifestName,
                            configurationPackage.ConfigPackageType.Name);

                        if (configurationPackage.SettingsType != null && configurationPackage.SettingsType.Section != null)
                        {
                            string configPackageDirectory = context.BuildLayoutSpecification.GetConfigPackageFolder(configKeyValuePair.Key, configurationPackage.ConfigPackageType.Name);
                            string configPackageArchive   = context.BuildLayoutSpecification.GetSubPackageArchiveFile(configPackageDirectory);

                            if (!FabricDirectory.Exists(configPackageDirectory) && !FabricFile.Exists(configPackageArchive))
                            {
                                continue;
                            }

                            ConfigOverrideType matchingConfigOverride = null;
                            if (matchingServiceManifestImport.ConfigOverrides != null)
                            {
                                matchingConfigOverride = matchingServiceManifestImport.ConfigOverrides.FirstOrDefault <ConfigOverrideType>(
                                    configOverride => ImageBuilderUtility.Equals(configOverride.Name, configurationPackage.ConfigPackageType.Name));
                            }

                            string settingsFileName = context.BuildLayoutSpecification.GetSettingsFile(configPackageDirectory);

                            DuplicateDetector sectionDuplicateDetector = new DuplicateDetector("Section", "Name", settingsFileName);
                            foreach (SettingsTypeSection section in configurationPackage.SettingsType.Section)
                            {
                                sectionDuplicateDetector.Add(section.Name);

                                SettingsOverridesTypeSection matchingConfigOverrideSection = null;
                                if (matchingConfigOverride != null && matchingConfigOverride.Settings != null)
                                {
                                    matchingConfigOverrideSection = matchingConfigOverride.Settings.FirstOrDefault <SettingsOverridesTypeSection>(
                                        configOverrideSection => ImageBuilderUtility.Equals(configOverrideSection.Name, section.Name));
                                }

                                if (section.Parameter != null)
                                {
                                    DuplicateDetector settingDuplicateDetector = new DuplicateDetector("Parameter", "Name", settingsFileName);
                                    foreach (SettingsTypeSectionParameter parameter in section.Parameter)
                                    {
                                        settingDuplicateDetector.Add(parameter.Name);

                                        if (!hasEncryptedParameter)
                                        {
                                            hasEncryptedParameter = parameter.IsEncrypted;
                                        }

                                        if (parameter.MustOverride)
                                        {
                                            SettingsOverridesTypeSectionParameter matchingOverrideParameter = null;
                                            if (matchingConfigOverrideSection != null && matchingConfigOverrideSection.Parameter != null)
                                            {
                                                matchingOverrideParameter = matchingConfigOverrideSection.Parameter.FirstOrDefault <SettingsOverridesTypeSectionParameter>(
                                                    configOverrideSetting => ImageBuilderUtility.Equals(configOverrideSetting.Name, parameter.Name));
                                            }

                                            if (matchingOverrideParameter == null)
                                            {
                                                ImageBuilderUtility.TraceAndThrowValidationErrorWithFileName(
                                                    TraceType,
                                                    settingsFileName,
                                                    StringResources.ImageBuilderError_ParameterNotOverriden,
                                                    parameter.Name);
                                            }
                                        }

                                        if (!String.IsNullOrEmpty(parameter.Type))
                                        {
                                            this.VerifySourceLocation(parameter.Name, "Settings.xml", parameter.Type);
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }

            if (hasEncryptedParameter &&
                RequireCertACLingForUsers(context.ApplicationManifest.Principals) &&
                (context.ApplicationManifest.Certificates == null || context.ApplicationManifest.Certificates.SecretsCertificate == null))
            {
                ImageBuilderUtility.TraceAndThrowValidationErrorWithFileName(
                    TraceType,
                    context.GetApplicationManifestFileName(),
                    StringResources.ImageBuilderError_EncryptedSettingsNoCertInAppManifest);
            }
        }