public string? UserName { get; set; }Public Property UserName As String
Get
Setpublic:
property String^ UserName {
String^ get ();
void set (String^ value);
}member UserName : string with get, setThis parameter MAY be specified on a Messengers or a SocialMediaProfiles property to name the user with that property value. Its value is case-sensitive.
The value of the Messengers or the SocialMediaProfiles property MUST be a URI.