private static void PopulateTelemetryContext()

in BASE/src/Microsoft.ApplicationInsights/Metrics/Extensibility/MetricAggregateToApplicationInsightsPipelineConverterBase.cs [41:208]
137 lines of code
35 McCabe index (conditional complexity)

        private static void PopulateTelemetryContext(
                                                IDictionary<string, string> dimensions,
                                                Microsoft.ApplicationInsights.DataContracts.TelemetryContext telemetryContext,
                                                out IEnumerable<KeyValuePair<string, string>> nonContextDimensions)
        {
            if (dimensions == null)
            {
                nonContextDimensions = null;
                return;
            }

            List<KeyValuePair<string, string>> nonContextDimensionList = null;

            foreach (KeyValuePair<string, string> dimension in dimensions)
            {
                if (String.IsNullOrWhiteSpace(dimension.Key) || dimension.Value == null)
                {
                    continue;
                }

                switch (dimension.Key)
                {
                    case MetricDimensionNames.TelemetryContext.InstrumentationKey:
                        telemetryContext.InstrumentationKey = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Cloud.RoleInstance:
                        telemetryContext.Cloud.RoleInstance = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Cloud.RoleName:
                        telemetryContext.Cloud.RoleName = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Component.Version:
                        telemetryContext.Component.Version = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Device.Id:
                        telemetryContext.Device.Id = dimension.Value;
                        break;

                    #pragma warning disable CS0618  // Type or member is obsolete
                    case MetricDimensionNames.TelemetryContext.Device.Language:
                        telemetryContext.Device.Language = dimension.Value;
                        break;
                    #pragma warning restore CS0618  // Type or member is obsolete

                    case MetricDimensionNames.TelemetryContext.Device.Model:
                        telemetryContext.Device.Model = dimension.Value;
                        break;

                    #pragma warning disable CS0618  // Type or member is obsolete
                    case MetricDimensionNames.TelemetryContext.Device.NetworkType:
                        telemetryContext.Device.NetworkType = dimension.Value;
                        break;
                    #pragma warning restore CS0618  // Type or member is obsolete

                    case MetricDimensionNames.TelemetryContext.Device.OemName:
                        telemetryContext.Device.OemName = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Device.OperatingSystem:
                        telemetryContext.Device.OperatingSystem = dimension.Value;
                        break;

                    #pragma warning disable CS0618  // Type or member is obsolete
                    case MetricDimensionNames.TelemetryContext.Device.ScreenResolution:
                        telemetryContext.Device.ScreenResolution = dimension.Value;
                        break;
                    #pragma warning restore CS0618  // Type or member is obsolete

                    case MetricDimensionNames.TelemetryContext.Device.Type:
                        telemetryContext.Device.Type = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Location.Ip:
                        telemetryContext.Location.Ip = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Operation.CorrelationVector:
                        telemetryContext.Operation.CorrelationVector = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Operation.Id:
                        telemetryContext.Operation.Id = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Operation.Name:
                        telemetryContext.Operation.Name = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Operation.ParentId:
                        telemetryContext.Operation.ParentId = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Operation.SyntheticSource:
                        telemetryContext.Operation.SyntheticSource = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Session.Id:
                        telemetryContext.Session.Id = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.Session.IsFirst:
                        try
                        {
                            telemetryContext.Session.IsFirst = System.Convert.ToBoolean(dimension.Value, CultureInfo.InvariantCulture);
                        }
                        catch
                        {
                            try
                            {
                                int val = System.Convert.ToInt32(dimension.Value, CultureInfo.InvariantCulture);
                                if (val == 1)
                                {
                                    telemetryContext.Session.IsFirst = true;
                                }
                                else if (val == 0)
                                {
                                    telemetryContext.Session.IsFirst = false;
                                }
                            }
                            catch
                            {
                            }
                        }

                        break;

                    case MetricDimensionNames.TelemetryContext.User.AccountId:
                        telemetryContext.User.AccountId = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.User.AuthenticatedUserId:
                        telemetryContext.User.AuthenticatedUserId = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.User.Id:
                        telemetryContext.User.Id = dimension.Value;
                        break;

                    case MetricDimensionNames.TelemetryContext.User.UserAgent:
                        telemetryContext.User.UserAgent = dimension.Value;
                        break;

                    default:
                        string dimensionName;
                        if (MetricDimensionNames.TelemetryContext.IsProperty(dimension.Key, out dimensionName))
                        {
                            telemetryContext.GlobalProperties[dimensionName] = dimension.Value;
                        }
                        else
                        {
                            if (nonContextDimensionList == null)
                            {
                                nonContextDimensionList = new List<KeyValuePair<string, string>>(dimensions.Count);
                            }

                            nonContextDimensionList.Add(dimension);
                        }

                        break;
                }
            }

            nonContextDimensions = nonContextDimensionList;
        }