query: Attempt to invoke virtual method [Null object reference]
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 92446
negative_passages.text: C#: How to pass null to a function expecting a ref?
negative_passages.docid: 134746
negative_passages.text: Where do "pure virtual function call" crashes come from?
negative_passages.docid: 73499
negative_passages.text: Why is Default constructor called in virtual inheritance?
negative_passages.docid: 289
negative_passages.text: What is a NullReferenceException, and how do I fix it?
negative_passages.docid: 96114
negative_passages.text: Compiler Ambiguous invocation error - anonymous method and method group with Func or Action
negative_passages.docid: 80631
negative_passages.text: NullPointerException but compiling?
negative_passages.docid: 153466
negative_passages.text: Implementing pure virtual functions with multiple inheritance
negative_passages.docid: 96453
negative_passages.text: Caught Throwable or Exception is null
negative_passages.docid: 36585
negative_passages.text: Calling a function using reflection that has a "params" parameter (MethodBase)
negative_passages.docid: 7935
negative_passages.text: CS0120: An object reference is required for the nonstatic field, method, or property 'foo'
negative_passages.docid: 79246
negative_passages.text: virtual methods
negative_passages.docid: 115847
negative_passages.text: Why are C# interface methods not declared abstract or virtual?
negative_passages.docid: 8283
negative_passages.text: Why does null reference print as "null"
negative_passages.docid: 144658
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object ,sravn
negative_passages.docid: 104046
negative_passages.text: Calling base method from derived class
negative_passages.docid: 79586
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object