gistfile1.cs

var tree = CSharpSyntaxTree.ParseText(@"
	public class MyClass {
			 int Method1() { return 0; }
			 void Method2()
			 {
				int x = Method1();
			 }
		}
	}");

var Mscorlib = PortableExecutableReference.CreateFromAssembly(typeof(object).Assembly);
var compilation = CSharpCompilation.Create("MyCompilation",
	syntaxTrees: new[] { tree }, references: new[] { Mscorlib });
var model = compilation.GetSemanticModel(tree);

//Looking at the first method symbol
var methodSyntax = tree.GetRoot().DescendantNodes().OfType<MethodDeclarationSyntax>().First();
var methodSymbol = model.GetDeclaredSymbol(methodSyntax);

Console.WriteLine(methodSymbol.ToString());         //MyClass.Method1()
Console.WriteLine(methodSymbol.ContainingSymbol);   //MyClass
Console.WriteLine(methodSymbol.IsAbstract);         //false

//Looking at the first invocation
var invocationSyntax = tree.GetRoot().DescendantNodes().OfType<InvocationExpressionSyntax>().First();
var invokedSymbol = model.GetSymbolInfo(invocationSyntax).Symbol; //Same as MyClass.Method1

Console.WriteLine(invokedSymbol.ToString());         //MyClass.Method1()
Console.WriteLine(invokedSymbol.ContainingSymbol);   //MyClass
Console.WriteLine(invokedSymbol.IsAbstract);         //false

Console.WriteLine(invokedSymbol.Equals(methodSymbol)); //true