public Token Rename( 
   Description description,
   string newName
)

// 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();

//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();