public class FeatureClassDescription : TableDescription 

{
  FieldDescription bigIntegerFieldDescription =
    new FieldDescription("BigInteger_64", FieldType.BigInteger);
}

{
  // 64-bit
  FieldDescription oidFieldDescription_64 =
    new FieldDescription("ObjectID_64", FieldType.OID)
    {
      Length = 8
    };

  // 32-bit
  FieldDescription oidFieldDescription_32 =
    new FieldDescription("ObjectID_32", FieldType.OID)
    {
      Length = 4
    };
}

{
  // Earthquake occurrences date and time

  // 9/28/2014 (DateOnly)
  FieldDescription earthquakeDateOnlyFieldDescription =
    new FieldDescription("Earthquake_DateOnly", FieldType.DateOnly);

  // 1:16:42 AM (TimeOnly)
  FieldDescription earthquakeTimeOnlyFieldDescription =
    new FieldDescription("Earthquake_TimeOnly", FieldType.TimeOnly);

  // 9/28/2014 1:16:42.000 AM -09:00 (Timestamp with Offset)
  FieldDescription earthquakeTimestampOffsetFieldDescription =
    new FieldDescription("Earthquake_TimestampOffset_Local", FieldType.TimestampOffset);

  // 9/28/2014 1:16:42 AM (DateTime)
  FieldDescription earthquakeDateFieldDescription =
    new FieldDescription("Earthquake_Date", FieldType.Date);
}

{
  // Must be called within QueuedTask.Run
  void CreateFeatureDatasetWithFeatureClassSnippet(Geodatabase geodatabase)
  {
    // Creating a FeatureDataset named as 'Parcel_Information' and a FeatureClass with name 'Parcels' in one operation
    string featureDatasetName = "Parcel_Information";
    string featureClassName = "Parcels";

    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

    // Create a FeatureDataset token
    FeatureDatasetDescription featureDatasetDescription = new FeatureDatasetDescription(featureDatasetName, SpatialReferences.WGS84);
    FeatureDatasetToken featureDatasetToken = schemaBuilder.Create(featureDatasetDescription);

    // Create a FeatureClass description
    FeatureClassDescription featureClassDescription = new FeatureClassDescription(featureClassName,
      new List<FieldDescription>()
      {
          new FieldDescription("Id", FieldType.Integer),
          new FieldDescription("Address", FieldType.String)
      },
      new ShapeDescription(GeometryType.Point, SpatialReferences.WGS84));

    // Create a FeatureClass inside a FeatureDataset
    FeatureClassToken featureClassToken = schemaBuilder.Create(
      new FeatureDatasetDescription(featureDatasetToken),
      featureClassDescription);

    // Build status
    bool buildStatus = schemaBuilder.Build();

    // Build errors
    if (!buildStatus)
    {
      IReadOnlyList<string> errors = schemaBuilder.ErrorMessages;
    }
  }
}

{
  // Must be called within QueuedTask.Run
  void CreateFeatureClassInsideFeatureDatasetSnippet(Geodatabase geodatabase)
  {
    // Creating a FeatureClass named as 'Tax_Jurisdiction' in existing FeatureDataset with name 'Parcels_Information'
    string featureDatasetName = "Parcels_Information";
    string featureClassName = "Tax_Jurisdiction";

    // Create a FeatureClass description
    FeatureClassDescription featureClassDescription = new FeatureClassDescription(featureClassName,
      new List<FieldDescription>()
      {
          new FieldDescription("Tax_Id", FieldType.Integer),
          new FieldDescription("Address", FieldType.String)
      },
      new ShapeDescription(GeometryType.Point, SpatialReferences.WGS84));

    FeatureDatasetDefinition featureDatasetDefinition = geodatabase.GetDefinition<FeatureDatasetDefinition>(featureDatasetName);

    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

    // Create a FeatureClass inside a FeatureDataset using a FeatureDatasetDefinition
    schemaBuilder.Create(new FeatureDatasetDescription(featureDatasetDefinition), featureClassDescription);

    // Build status
    bool buildStatus = schemaBuilder.Build();

    // Build errors
    if (!buildStatus)
    {
      IReadOnlyList<string> errors = schemaBuilder.ErrorMessages;
    }
  }
}

{
  // Must be called within QueuedTask.Run
  void AddFieldWithDomainSnippet(Geodatabase geodatabase)
  {
    //The FeatureClass to add field
    string featureClassName = "Pipes";

    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

    // Create a CodedValueDomain description for water pipes
    CodedValueDomainDescription pipeDomainDescription = new CodedValueDomainDescription("WaterPipeTypes",
      FieldType.String, new SortedList<object, string>
      {
          { "C_1", "Copper" },
          { "S_2", "Steel" }
      })
    {
      SplitPolicy = SplitPolicy.Duplicate,
      MergePolicy = MergePolicy.DefaultValue
    };

    // Create a coded value domain token
    CodedValueDomainToken codedValueDomainToken = schemaBuilder.Create(pipeDomainDescription);

    // Create a new description from domain token
    CodedValueDomainDescription codedValueDomainDescription = new CodedValueDomainDescription(codedValueDomainToken);

    // Create a field named as 'PipeType' using a domain description
    FieldDescription domainFieldDescription = new FieldDescription("PipeType", FieldType.String);
    domainFieldDescription.SetDomainDescription(codedValueDomainDescription);

    //Retrieve existing information for 'Pipes' FeatureClass
    FeatureClassDefinition originalFeatureClassDefinition = geodatabase.GetDefinition<FeatureClassDefinition>(featureClassName);
    FeatureClassDescription originalFeatureClassDescription =
      new FeatureClassDescription(originalFeatureClassDefinition);

    // Add domain field on existing fields
    // Adding a field,'PipeType', which uses the coded value domain to the 'Pipes' FeatureClass
    List<FieldDescription> modifiedFieldDescriptions = new List<FieldDescription>(originalFeatureClassDescription.FieldDescriptions)
      { domainFieldDescription };

    // Create a new description with updated fields for 'Pipes' FeatureClass 
    FeatureClassDescription featureClassDescription = new FeatureClassDescription(originalFeatureClassDescription.Name, modifiedFieldDescriptions,
      originalFeatureClassDescription.ShapeDescription);

    // Update the 'Pipes' FeatureClass with domain field
    schemaBuilder.Modify(featureClassDescription);

    // Build status
    bool buildStatus = schemaBuilder.Build();

    // Build errors
    if (!buildStatus)
    {
      IReadOnlyList<string> errors = schemaBuilder.ErrorMessages;
    }
  }
}