public RangeDomainToken Create( 
   RangeDomainDescription rangeDomainDescription
)

{
  // Must be called within QueuedTask.Run
  void CreateRangeDomainSnippet(Geodatabase geodatabase)
  {
    // Create a range description with minimum value = 0 and maximum value = 1000
    RangeDomainDescription rangeDomainDescriptionMinMax = new RangeDomainDescription("RangeDomain_0_1000",
        FieldType.Integer, 0, 1000)
    { Description = "Domain value ranges from 0 to 1000" };

    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

    // Create  a range domain 
    schemaBuilder.Create(rangeDomainDescriptionMinMax);
    schemaBuilder.Build();
  }
}

{
    await QueuedTask.Run(() =>
    {
      using (var kg = GetKnowledgeGraph(url))
      {
        var entity_name = "Fruit";

        //Domains are managed on the GDB objects...
        var fruit_fc = kg.OpenDataset<FeatureClass>(entity_name);
        var fruit_fc_def = fruit_fc.GetDefinition();

        var fieldFruitTypes = fruit_fc_def.GetFields()
              .FirstOrDefault(f => f.Name == "FruitTypes");
        var fieldShelfLife = fruit_fc_def.GetFields()
            .FirstOrDefault(f => f.Name == "ShelfLife");

        //Create a coded value domain and add it to a new field
        var fruit_cvd_desc = new CodedValueDomainDescription(
          "FruitTypes", FieldType.String,
          new SortedList<object, string> {
                      { "A", "Apple" },
                      { "B", "Banana" },
                      { "C", "Coconut" }
          })
        {
          SplitPolicy = SplitPolicy.Duplicate,
          MergePolicy = MergePolicy.DefaultValue
        };

        //Create a Range Domain and add the domain to a new field description also
        var shelf_life_rd_desc = new RangeDomainDescription(
                                      "ShelfLife", FieldType.Integer, 0, 14);

        var sb = new SchemaBuilder(kg);
        sb.Create(fruit_cvd_desc);
        sb.Create(shelf_life_rd_desc);

        //Create the new field descriptions that will be associated with the
        //"new" FruitTypes coded value domain and the ShelfLife range domain
        var fruit_types_fld = new ArcGIS.Core.Data.DDL.FieldDescription(
                                      "FruitTypes", FieldType.String);
        fruit_types_fld.SetDomainDescription(fruit_cvd_desc);

        //ShelfLife will use the range domain
        var shelf_life_fld = new ArcGIS.Core.Data.DDL.FieldDescription(
"ShelfLife", FieldType.Integer);
        shelf_life_fld.SetDomainDescription(shelf_life_rd_desc);

        //Add the descriptions to the list of field descriptions for the
        //fruit feature class - Modify schema needs _all_ fields to be included
        //in the schema, not just the new ones to be added.
        var fruit_fc_desc = new FeatureClassDescription(fruit_fc_def);

        var modified_fld_descs = new List<ArcGIS.Core.Data.DDL.FieldDescription>(
          fruit_fc_desc.FieldDescriptions);

        modified_fld_descs.Add(fruit_types_fld);
        modified_fld_descs.Add(shelf_life_fld);

        //Create a feature class description to modify the fruit entity
        //with the new fields and their associated domains
        var updated_fruit_fc =
          new FeatureClassDescription(entity_name, modified_fld_descs,
                                      fruit_fc_desc.ShapeDescription);

        //Add the modified fruit fc desc to the schema builder
        sb.Modify(updated_fruit_fc);

        //Run the schema builder
        try
        {
          if (!kg.ApplySchemaEdits(sb))
          {
            var err_msg = string.Join(",", sb.ErrorMessages.ToArray());
            System.Diagnostics.Debug.WriteLine($"Create domains error: {err_msg}");
          }
        }
        catch (Exception ex)
        {
          System.Diagnostics.Debug.WriteLine(ex.ToString());
        }
      }
    });
  }

{
  // Must be called within QueuedTask.Run
  void CreatingTableWithIndex(SchemaBuilder schemaBuilder)
  {
    FieldDescription nameFieldDescription = FieldDescription.CreateStringField("Name", 50);
    FieldDescription addressFieldDescription = FieldDescription.CreateStringField("Address", 200);

    // Creating a feature class, 'Buildings' with two fields
    TableDescription tableDescription = new TableDescription("Buildings",
      new List<FieldDescription>() { nameFieldDescription, addressFieldDescription });

    // Enqueue DDL operation to create a table
    TableToken tableToken = schemaBuilder.Create(tableDescription);

    // Creating an attribute index named as 'Idx'
    AttributeIndexDescription attributeIndexDescription = new AttributeIndexDescription("Idx", new TableDescription(tableToken),
      new List<string> { nameFieldDescription.Name, addressFieldDescription.Name });

    // Enqueue DDL operation to create an attribute index
    schemaBuilder.Create(attributeIndexDescription);

    // Execute build indexes operation
    bool isBuildSuccess = schemaBuilder.Build();
  }
}

{
  // Must be called within QueuedTask.Run
  void AddingIndexes(SchemaBuilder schemaBuilder, FeatureClassDefinition featureClassDefinition)
  {
    // Field names to add in the attribute index
    string fieldName = featureClassDefinition.GetFields().First(f => f.AliasName.Contains("Name")).Name;
    string fieldAddress = featureClassDefinition.GetFields().First(f => f.AliasName.Contains("Address")).Name;

    // Creating an attribute index with index name 'Idx' and two participating fields' name
    AttributeIndexDescription attributeIndexDescription = new AttributeIndexDescription("Idx",
      new TableDescription(featureClassDefinition), new List<string> { fieldName, fieldAddress });

    // Enqueue DDL operation for an attribute index creation 
    schemaBuilder.Create(attributeIndexDescription);

    // Creating the spatial index 
    SpatialIndexDescription spatialIndexDescription = new SpatialIndexDescription(new FeatureClassDescription(featureClassDefinition));

    // Enqueue DDL operation for the spatial index creation
    schemaBuilder.Create(spatialIndexDescription);

    // Execute build indexes operation
    bool isBuildSuccess = schemaBuilder.Build();

    if (!isBuildSuccess)
    {
      IReadOnlyList<string> errors = schemaBuilder.ErrorMessages;
      // Iterate and handle errors 
    }
  }
}

{
  // Must be called within QueuedTask.Run
  void CreateTableWithSubtypes(SchemaBuilder schemaBuilder)
  {
    // Creating a 'Building' table with the subtype field 'BuildingType'
    FieldDescription buildingType = new FieldDescription("BuildingType", FieldType.Integer);
    FieldDescription buildingName = new FieldDescription("Name", FieldType.String);

    TableDescription tableDescription = new TableDescription("Building", new List<FieldDescription> { buildingName, buildingType });

    // Add the building type subtype with three subtypes - Business, Marketing, Security
    tableDescription.SubtypeFieldDescription = new SubtypeFieldDescription(buildingType.Name,
      new Dictionary<int, string> { { 1, "Business" }, { 2, "Marketing" }, { 3, "Security" } })
    {
      DefaultSubtypeCode = 3 // Assigning 'Security' building type as the default subtype
    };

    schemaBuilder.Create(tableDescription);
    schemaBuilder.Build();
  }
}

{
  // Must be called within QueuedTask.Run
  void CreateRelationshipWithRelationshipRules(SchemaBuilder schemaBuilder)
  {
    // Creating a 'BuildingType' table with two fields - BuildingType and BuildingTypeDescription
    FieldDescription buildingType = FieldDescription.CreateIntegerField("BuildingType");
    FieldDescription buildingTypeeDescription = FieldDescription.CreateStringField("BuildingTypeDescription", 100);
    TableDescription buildingTypeDescription = new TableDescription("BuildingType",
      new List<FieldDescription>() { buildingType, buildingTypeeDescription });
    TableToken buildingtypeToken = schemaBuilder.Create(buildingTypeDescription);

    // Creating a 'Building' feature class with three fields - BuildingId, Address, and BuildingType
    FieldDescription buildingId = FieldDescription.CreateIntegerField("BuildingId");
    FieldDescription buildingAddress = FieldDescription.CreateStringField("Address", 100);
    FieldDescription usageSubType = FieldDescription.CreateIntegerField("UsageSubtype");
    FeatureClassDescription featureClassDescription = new FeatureClassDescription("Building",
      new List<FieldDescription> { buildingId, buildingAddress, buildingType, usageSubType },
      new ShapeDescription(GeometryType.Polygon, SpatialReferences.WGS84));

    // Set subtype details (optional)
    featureClassDescription.SubtypeFieldDescription = new SubtypeFieldDescription(usageSubType.Name,
      new Dictionary<int, string> { { 1, "Marketing" }, { 2, "Utility" } });

    FeatureClassToken buildingToken = schemaBuilder.Create(featureClassDescription);

    // Creating a 1:M relationship between the 'Building' feature class and 'BuildingType' table
    RelationshipClassDescription relationshipClassDescription = new RelationshipClassDescription(
      "BuildingToBuildingType", new FeatureClassDescription(buildingToken), new TableDescription(buildingtypeToken),
      RelationshipCardinality.OneToMany, buildingType.Name, buildingType.Name)
    {
      RelationshipType = RelationshipType.Composite
    };

    // Adding relationship rules for the 'Marketing' subtype
    relationshipClassDescription.RelationshipRuleDescriptions.Add(new RelationshipRuleDescription(1, null));

    schemaBuilder.Create(relationshipClassDescription);
    schemaBuilder.Build();
  }
}

{
  // Must be called within QueuedTask.Run
  void CreateAttributedRelationship(SchemaBuilder schemaBuilder)
  {
    // Creating a 'BuildingType' table with two fields - BuildingType and BuildingTypeDescription
    FieldDescription buildingType = FieldDescription.CreateIntegerField("BuildingType");
    FieldDescription buildingTypeeDescription = FieldDescription.CreateStringField("BuildingTypeDescription", 100);
    TableDescription buildingTypeDescription = new TableDescription("BuildingType",
      new List<FieldDescription>() { buildingType, buildingTypeeDescription });
    TableToken buildingtypeToken = schemaBuilder.Create(buildingTypeDescription);

    // Creating a 'Building' feature class with three fields - BuildingId, Address, and BuildingType
    FieldDescription buildingId = FieldDescription.CreateIntegerField("BuildingId");
    FieldDescription buildingAddress = FieldDescription.CreateStringField("Address", 100);
    FeatureClassDescription featureClassDescription = new FeatureClassDescription("Building",
      new List<FieldDescription> { buildingId, buildingAddress, buildingType },
      new ShapeDescription(GeometryType.Polygon, SpatialReferences.WGS84));
    FeatureClassToken buildingToken = schemaBuilder.Create(featureClassDescription);

    // Creating M:M relationship between the 'Building' feature class and 'BuildingType' table
    AttributedRelationshipClassDescription attributedRelationshipClassDescription =
      new AttributedRelationshipClassDescription("BuildingToBuildingType",
        new FeatureClassDescription(buildingToken),
        new TableDescription(buildingtypeToken), RelationshipCardinality.ManyToMany, "OBJECTID", "BuildingID",
        "OBJECTID", "BuildingTypeID");

    // Adding optional attribute field in the intermediate table - 'OwnershipPercentage' field
    attributedRelationshipClassDescription.FieldDescriptions.Add(FieldDescription.CreateIntegerField("OwnershipPercentage"));

    schemaBuilder.Create(attributedRelationshipClassDescription);
    schemaBuilder.Build();
  }
}