Every instance of Uri is immutable. This class wraps a Uri object and allows you to modify some of its properties without needing to create a new Uri. It is analogous to the System.Text.StringBuilder class for strings.

public class UriBuilder {
// Public Constructors
   public UriBuilder( );
   public UriBuilder(string uri);
   public UriBuilder(string schemeName, string hostName);
   public UriBuilder(string scheme, string host, int portNumber);
   public UriBuilder(string scheme, string host, int port, string pathValue);
   public UriBuilder(string scheme, string host, int port, string path, string extraValue);
   public UriBuilder(Uri uri);
// Public Instance Properties
   public string Fragment{set; get; }
   public string Host{set; get; }
   public string Password{set; get; }
   public string Path{set; get; }
   public int Port{set; get; }
   public string Query{set; get; }
   public string Scheme{set; get; }
   public Uri Uri{get; }
   public string UserName{set; get; }
// Public Instance Methods
   public override bool Equals(object rparam);       
// overrides object
   public override int GetHashCode( );    
// overrides object
   public override string ToString( );    
// overrides object
}