Sana Text ,Rich Text, Simple Text

use Sana Text in C# code:

CommerceFrameworkBase.SanaTexts.GetSanaText("ShopAccountNameLabel", "Shop Account"));

use Static class

ExtendedSanaTextKeys.CutOffTimePassed 

public static class ExtendedSanaTextKeys
    {
        public const string CutOffTimePassed = "Validation_CutOff";
    }

and Add text to SanaText.resx

<data name="Validation_CutOff" xml:space="preserve">
    <value>Requested delivery date is invalid or the cut off time has been missed.</value>
  </data>

Sana Text in Html

@Sana.SimpleText("ViewOrderDetails")


Rich Text

 @Sana.RichText("YouAreCurrentlyEditingOrder")

use with replace tags. 

@Sana.SimpleText("YourFirstPossibleDeliveryDate", "Your first possible delivery date is [FirstPossibleDeliveryDate]").iReplace("[FirstPossibleDeliveryDate]", nextDeleverydate.AsHtml(encode: true))

 string message = CommerceFrameworkBase.SanaTexts.GetSanaText("CustomerSwitchMessage").Replace("[SubAccountEmailAddress]", currentShopAccount.Email)

                .Replace("[CustomerAccountIDorigin]", currentShopAccount.ReferenceId)

                .Replace("[CustomerAccountNameOrigin]", currentCustomer.Name)

                .Replace("[CustomerAccountIDNew]", newCustomerId)

                .Replace("[CustomerAccountNameNew]", newCustomerName);