Get Picklist ,Status , State Lable Value

Get OptionSet Lable Value
function call :
GetOptionsSetTextOnValue(service, Opportunity.EntityLogicalName, “opportunityratingcode”, ((OptionSetValue)_entityOpp.Attributes["opportunityratingcode"]).Value);

 private string GetOptionsSetTextOnValue(IOrganizationService service, string entityName, string attributeName, int selectedValue)
        {

            RetrieveAttributeRequest retrieveAttributeRequest = new
            RetrieveAttributeRequest
            {

                EntityLogicalName = entityName,

                LogicalName = attributeName,

                RetrieveAsIfPublished = true

            };
            // Execute the request.
            RetrieveAttributeResponse retrieveAttributeResponse = (RetrieveAttributeResponse)service.Execute(retrieveAttributeRequest);
            // Access the retrieved attribute.

            Microsoft.Xrm.Sdk.Metadata.PicklistAttributeMetadata retrievedPicklistAttributeMetadata = (Microsoft.Xrm.Sdk.Metadata.PicklistAttributeMetadata)

            retrieveAttributeResponse.AttributeMetadata;// Get the current options list for the retrieved attribute.
            OptionMetadata[] optionList = retrievedPicklistAttributeMetadata.OptionSet.Options.ToArray();
            string selectedOptionLabel = string.Empty;
            foreach (OptionMetadata oMD in optionList)
            {
                if (oMD.Value == selectedValue)
                {
                    selectedOptionLabel = oMD.Label.UserLocalizedLabel.Label;

                }

            }
            return selectedOptionLabel;
        }

Get State Lable Value

private string GetStateTextOnValue(IOrganizationService service, string entityName, string attributeName, int selectedValue)
        {

            RetrieveAttributeRequest retrieveAttributeRequest = new
            RetrieveAttributeRequest
            {

                EntityLogicalName = entityName,

                LogicalName = attributeName,

                RetrieveAsIfPublished = true

            };
            // Execute the request.
            RetrieveAttributeResponse retrieveAttributeResponse = (RetrieveAttributeResponse)service.Execute(retrieveAttributeRequest);
            // Access the retrieved attribute.

            AttributeMetadata attrMetadata =
        (AttributeMetadata)retrieveAttributeResponse.AttributeMetadata;// Get the current options list for the retrieved attribute.

            // Cast the AttributeMetadata to StatusAttribute data
            StateAttributeMetadata statusAttrMetadata =
                (StateAttributeMetadata)attrMetadata;

            string selectedOptionLabel = string.Empty;
            foreach( StateOptionMetadata statusMeta in
    statusAttrMetadata.OptionSet.Options)
            {
                if (statusMeta.Value == selectedValue)
                {
                    selectedOptionLabel = statusMeta.Label.UserLocalizedLabel.Label;

                }

            }
            return selectedOptionLabel;
        }

Get Status Lable Value

private string GetStatusTextOnValue(IOrganizationService service, string entityName, string attributeName, int selectedValue)
        {

            RetrieveAttributeRequest retrieveAttributeRequest = new
            RetrieveAttributeRequest
            {

                EntityLogicalName = entityName,

                LogicalName = attributeName,

                RetrieveAsIfPublished = true

            };
            // Execute the request.
            RetrieveAttributeResponse retrieveAttributeResponse = (RetrieveAttributeResponse)service.Execute(retrieveAttributeRequest);
            // Access the retrieved attribute.

            AttributeMetadata attrMetadata =
        (AttributeMetadata)retrieveAttributeResponse.AttributeMetadata;// Get the current options list for the retrieved attribute.

            // Cast the AttributeMetadata to StatusAttribute data
            StatusAttributeMetadata statusAttrMetadata =
                (StatusAttributeMetadata)attrMetadata;

            string selectedOptionLabel = string.Empty;
            foreach (StatusOptionMetadata statusMeta in
    statusAttrMetadata.OptionSet.Options)
            {
                if (statusMeta.Value == selectedValue)
                {
                    selectedOptionLabel = statusMeta.Label.UserLocalizedLabel.Label;

                }

            }
            return selectedOptionLabel;
        }