By default, the AssemblyQualifiedName property is empty. The AssemblyQualifiedName property specifies the assembly-qualified name of the type, which includes the name of the assembly from which this type object should be created. In /NET framework, the AssemblyQualifiedName property is similar with the AssemblyQualifiedName property of System.Type class. The Destroy method unloads the hosting control. 

There are three ways of loading/creating a manifest/component/assembly as listed:

• AssemblyLocation property, loads the first public, browseable control found in the specified location. If there are more public, browseable controls in the assembly, you can use the AssemblyName or AssemblyQualifiedName property to specify the fully qualified name of the type to be hosted.
• AssemblyQualifiedName property, loads and creates the object based on the assembly-qualified name of the type, which includes the name of the assembly from which this type object was loaded. Sample: "System.Windows.Forms.ListView, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
• Create(assemblyLocation, assemblyName) method loads the specified file, and creates the giving type.

If succeeded, ( the assembly is loaded and the object is created ), the 

• IsCreated property returns the type of the object being created such as: NETHostType_exNETHostControl, if an object of System.Windows.Forms.Control type was created or NETHostType_exNETHostObject a generic object was created.
• AssemblyLocation property returns the location of the loaded file that contains the manifest/component/assembly. Sample: "C:\Windows\assembly\GAC_MSIL\System.Windows.Forms\2.0.0.0__b77a5c561934e089\System.Windows.Forms.dll"
• AssemblyName property returns the fully qualified name of the type, including its namespace but not its assembly. Sample: "System.Windows.Forms.ScrollableControl"
• AssemblyQualifiedName property gets the assembly-qualified name of the type, which includes the name of the assembly from which this type object was loaded. Sample: "System.Windows.Forms.ScrollableControl, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" 

The Host property returns the object being hosted by the NETHost control.

If fails, the 

• IsCreated property returns NETHostType_exNETHostNothing, which indicates no object has been created
• AssemblyLocation, AssemblyName and  AssemblyQualifiedName return empty string
• Host property returns nothing.