public Token Rename( 
   Description description,
   string newName
)

public void RenameFeatureDatasetSnippet(Geodatabase geodatabase)
{
    // Renaming a FeatureDataset from 'Parcel_Information' to 'Parcel_Information_With_Tax_Jurisdiction'

    string originalDatasetName = "Parcel_Information";
    string datasetRenameAs = "Parcel_Information_With_Tax_Jurisdiction";

    FeatureDatasetDefinition originalDatasetDefinition =
      geodatabase.GetDefinition<FeatureDatasetDefinition>(originalDatasetName);
    FeatureDatasetDescription originalFeatureDatasetDescription = new FeatureDatasetDescription(originalDatasetDefinition);

    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

    // Rename the existing FeatureDataset, 'Parcel_Information' to 'Parcel_Information_With_Tax_Jurisdiction'
    schemaBuilder.Rename(originalFeatureDatasetDescription, datasetRenameAs);
    schemaBuilder.Build();
}

public void RenameTableSnippet(Geodatabase geodatabase)
{
    //Renaming a table from 'Original_Table' to 'Renamed_Table'

    string tableToBeRenamed = "Original_Table";
    string tableRenameAs = "Renamed_Table";

    TableDefinition tableDefinition = geodatabase.GetDefinition<TableDefinition>(tableToBeRenamed);

    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);

    // Table rename 
    schemaBuilder.Rename(new TableDescription(tableDefinition), tableRenameAs);
    schemaBuilder.Build();
}

public void RenameDomain(Geodatabase geodatabase, string rangeDomainOldName = "PipeDiameter", string rangeDomainNewName = "PipeDiam")
{
    SchemaBuilder schemaBuilder = new SchemaBuilder(geodatabase);
    RangeDomain rangeDomain = geodatabase.GetDomains().First(f => f.GetName().Equals(rangeDomainOldName)) as RangeDomain;

    // Renaming a domain
    schemaBuilder.Rename(new RangeDomainDescription(rangeDomain), rangeDomainNewName);
    schemaBuilder.Build();
}

public void Rename(SchemaBuilder schemaBuilder, AnnotationFeatureClassDefinition annotationFeatureClassDefinition, string featureClassNewName)
{
    AnnotationFeatureClassDescription annotationFeatureClassDescription = new AnnotationFeatureClassDescription(annotationFeatureClassDefinition);

    // Enqueue rename operation
    schemaBuilder.Rename(annotationFeatureClassDescription, featureClassNewName);

    // Execute DDL
    schemaBuilder.Build();
}