How to get all the Model name and Entity name through programmatically

I am using this code to get Model name

clientProxy = GetClientProxy(mdsURL);

ModelMembersGetRequest request = new ModelMembersGetRequest();
ModelMembersGetResponse response = new ModelMembersGetResponse();

response=clientProxy.ModelMembersGet(request);

Model member count i am getting zero

Error count is 1(required parameter is missing)

please help me to resolve the issue