/// <remarks/>
 public void listMetadataAsync(ListMetadataQuery[] queries, double asOfVersion, object userState) {
     if ((this.listMetadataOperationCompleted == null)) {
         this.listMetadataOperationCompleted = new System.Threading.SendOrPostCallback(this.OnlistMetadataOperationCompleted);
     }
     this.InvokeAsync("listMetadata", new object[] {
                 queries,
                 asOfVersion}, this.listMetadataOperationCompleted, userState);
 }
 /// <remarks/>
 public void listMetadataAsync(ListMetadataQuery[] queries, double asOfVersion) {
     this.listMetadataAsync(queries, asOfVersion, null);
 }