> For the complete documentation index, see [llms.txt](https://docs.lithnet.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lithnet.io/ecma2-framework/v2.0/advanced/index/lithnet.ecma2framework.dropdownparameterattribute.md).
# DropdownParameterAttribute
Namespace: Lithnet.Ecma2Framework
Defines a configuration parameter that is rendered as a drop down control in the management agent's configuration pages
```csharp
public class DropdownParameterAttribute : DataParameterAttribute
```
Inheritance [Object](https://docs.microsoft.com/en-us/dotnet/api/system.object) → [Attribute](https://docs.microsoft.com/en-us/dotnet/api/system.attribute) → [ParameterAttribute](/ecma2-framework/v2.0/advanced/index/lithnet.ecma2framework.parameterattribute.md) → [DataParameterAttribute](/ecma2-framework/v2.0/advanced/index/lithnet.ecma2framework.dataparameterattribute.md) → [DropdownParameterAttribute](/ecma2-framework/v2.0/advanced/index/lithnet.ecma2framework.dropdownparameterattribute.md)
## Properties
### **Extensible**
Gets a boolean value that indicates if users should be able to specify their own value in addition to the displayed values
```csharp
public bool Extensible { get; }
```
#### Property Value
[Boolean](https://docs.microsoft.com/en-us/dotnet/api/system.boolean)
### **DisplayedValues**
Gets the list of values that should be displayed in the drop down list
```csharp
public String[] DisplayedValues { get; }
```
#### Property Value
[String\[\]](https://docs.microsoft.com/en-us/dotnet/api/system.string)
### **Name**
Gets the name of the parameter, as shown to the user on the MIM configuration page
```csharp
public string Name { get; }
```
#### Property Value
[String](https://docs.microsoft.com/en-us/dotnet/api/system.string)
### **TypeId**
```csharp
public object TypeId { get; }
```
#### Property Value
[Object](https://docs.microsoft.com/en-us/dotnet/api/system.object)
## Constructors
### **DropdownParameterAttribute(String, Boolean, String\[])**
Initializes a new instance of the DropdownParameterAttribute class
```csharp
public DropdownParameterAttribute(string name, bool extensible, String[] displayedValues)
```
#### Parameters
`name` [String](https://docs.microsoft.com/en-us/dotnet/api/system.string)\
The name of the parameter, as shown to the user on the MIM configuration page
`extensible` [Boolean](https://docs.microsoft.com/en-us/dotnet/api/system.boolean)\
A boolean value that indicates if users should be able to specify their own value in addition to the displayed values
`displayedValues` [String\[\]](https://docs.microsoft.com/en-us/dotnet/api/system.string)\
The list of values that should be displayed in the drop down list
---
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