namespace System.Xml { public abstract class XmlResolver { public virtual ICredentials Credentials { set; } protected XmlResolver(); public abstract object GetEntity(Uri absoluteUri, string role, Type ofObjectToReturn); public virtual Task<object> GetEntityAsync(Uri absoluteUri, string role, Type ofObjectToReturn); public virtual Uri ResolveUri(Uri baseUri, string relativeUri); public virtual bool SupportsType(Uri absoluteUri, Type type); } }