AddField | Adds a new CustomizationTypedField. | 
  RemoveField | Removes the CustomizationTypedField specified by FieldName from this type. | 
  EditingControl | The editing control CLSID for COM or the fully qualified assembly name for .NET. | 
  Field | Gets the CustomizationTypedField specified by FieldName. | 
  Fields | The list of CustomizationTypedField objects for this type. | 
  HasDirectCoverage | Indicates if this requirement type supports direct coverage by tests or test instances. | 
  Icon | The bitmap stream for type icon. | 
  ID | The CustomizationType ID. | 
  IsTemplate | Checks whether the customization item originated from the project template. | 
  Name | The CustomizationType name. | 
  RichTextTemplate | Rich text document template of the requirement type. | 
  RiskAnalysisType | The Type of the Risk Analysis that is applicable to this requirement. |