APISampleUnitTestsCS.FAQ.FindAllInvocationsOfAMethod C# (CSharp) Method

        public void FindAllInvocationsOfAMethod()
        {
            var tree = SyntaxTree.ParseText(@"
            class C1
            {
            public void M1() { M2(); }
            public void M2() { }
            }
            class C2
            {
            public void M1() { M2(); new C1().M2(); }
            public void M2() { }
            }
            class Program
            {
            static void Main() { }
            }");
            var mscorlib = MetadataReference.CreateAssemblyReference("mscorlib");
            var compilation = Compilation.Create("MyCompilation",
                syntaxTrees: new[] { tree }, references: new[] { mscorlib });
            var model = compilation.GetSemanticModel(tree);

            // Get MethodDeclarationSyntax corresponding to method C1.M2() above.
            MethodDeclarationSyntax methodDeclaration = tree.GetRoot()
                .DescendantNodes().OfType<ClassDeclarationSyntax>().Single(c => c.Identifier.ValueText == "C1")
                .DescendantNodes().OfType<MethodDeclarationSyntax>().Single(m => m.Identifier.ValueText == "M2");

            // Get MethodSymbol corresponding to method C1.M2() above.
            MethodSymbol method = model.GetDeclaredSymbol(methodDeclaration);

            // Get all InvocationExpressionSyntax in the above code.
            var allInvocations = tree.GetRoot()
                .DescendantNodes().OfType<InvocationExpressionSyntax>();

            // Use GetSymbolInfo() to find invocations of method C1.M2() above.
            var matchingInvocations = allInvocations
                .Where(i => model.GetSymbolInfo(i).Symbol.Equals(method));
            Assert.AreEqual(2, matchingInvocations.Count());
        }