public void Delete( 
   Description description
)

public void DeleteTableSnippet(Geodatabase geodatabase, Table table)
{
  // Create a TableDescription object
  TableDescription tableDescription = new TableDescription(table.GetDefinition());

  // Create a SchemaBuilder object
  SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

  // Add the deletion of the table to our list of DDL tasks
  schemaBuilder.Delete(tableDescription);

  // Execute the DDL
  bool success = schemaBuilder.Build();
}

public void DeleteFeatureClassSnippet(Geodatabase geodatabase, FeatureClass featureClass)
{
  // Create a FeatureClassDescription object
  FeatureClassDescription featureClassDescription = new FeatureClassDescription(featureClass.GetDefinition());

  // Create a SchemaBuilder object
  SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

  // Add the deletion fo the feature class to our list of DDL tasks
  schemaBuilder.Delete(featureClassDescription);

  // Execute the DDL
  bool success = schemaBuilder.Build();
}

public void DeleteFeatureDatasetSnippet(Geodatabase geodatabase)
{
  // Deleting a FeatureDataset named as 'Parcel_Information'

  FeatureDatasetDefinition featureDatasetDefinition = geodatabase.GetDefinition<FeatureDatasetDefinition>("Parcel_Information");
  FeatureDatasetDescription featureDatasetDescription =
    new FeatureDatasetDescription(featureDatasetDefinition);

  SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

  // Delete an existing feature dataset named as 'Parcel_Information'
  schemaBuilder.Delete(featureDatasetDescription);
  schemaBuilder.Build();
}

public void RemoveSpatialIndex(SchemaBuilder schemaBuilder, FeatureClassDefinition featureClassDefinition)
{
  // Create a spatial description  
  SpatialIndexDescription spatialIndexDescription = new SpatialIndexDescription(new FeatureClassDescription(featureClassDefinition));

  // Enqueue the DDL operation to remove index 
  schemaBuilder.Delete(spatialIndexDescription);

  // Execute the delete index operation
  bool isDeleteIndexSuccess = schemaBuilder.Build();
}

public void DeleteDomain(Geodatabase geodatabase, string domainNameToBeDeleted = "PipeMaterial")
{
  SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);
  CodedValueDomain codedValueDomain = geodatabase.GetDomains().First(f => f.GetName().Equals(domainNameToBeDeleted)) as CodedValueDomain;
  CodedValueDomainDescription codedValueDomainDescription = new CodedValueDomainDescription(codedValueDomain);

  // Deleting a coded value domain
  schemaBuilder.Delete(codedValueDomainDescription);
  schemaBuilder.Build();
}

public void DeleteRelationshipClass(SchemaBuilder schemaBuilder, RelationshipClassDefinition relationshipClassDefinition)
{
  schemaBuilder.Delete(new RelationshipClassDescription(relationshipClassDefinition));
  schemaBuilder.Build();
}