Error: The type arguments for method
GraphMLExtensions.SerializeToGraphML<TVertex,TEdge,TGraph>(TGraph,
XmlWriter) cannot be inferred from the usage.

using System.Xml;
using QuickGraph;
using QuickGraph.Serialization;    

var g = new AdjacencyGraph<string,Edge<string>>();

.... add some vertices and edges ....

using (var xwriter = XmlWriter.Create("somefile.xml"))
  g.SerializeToGraphML(xwriter);

代码是从QuickGraph的文档中复制的.但是,当我明确地写它时,它有效：

using (var xwriter = XmlWriter.Create("somefile.xml"))
   GraphMLExtensions.SerializeToGraphML<string,Edge<string>,AdjacencyGraph<string,Edge<string>>>(g,xwriter);

编辑：我看到了一些相关的问题,但它们对我来说太先进了.我只是担心使用它.我做错了什么还是文件？