CE C# Build Display Rules programmatically

Hi everyone,

I'm developing an AddIn in C # for Microstation Connect Version 12 and I should create, by code, a rule to insert in a display rules.

If I create the following rule (REFERENCE.References.Logical Name = Attachment_1), in the Microstation environment, everything works correctly (DisplayRules1.JPG) .

If I try to create the same rule from c # Microstation I get the message "Unrecognized Criteria" (DisplayRules2.JPG)

Code Example :

"string fieldValue = "Attachment_1";

string RuleStenName = "RulSet_1";

string MyRuleCondition = $@"REFERENCE.References.Logical Name = {fieldValue}";"

Could anyone tell me what is the exact way to build this rule condition from code?

Thanks for your help,

Salvio