Expression Tree Tutorial Field

You can build an expression tree which contains accessing a given field by its name using Expression.Field method. For example, you have the following code.

TestClass obj = new TestClass();
Console.WriteLine(obj.myField);

Here is the code that is required to build the same functionality using expression tree.

Expression fieldExpr = Expression.Field(
    Expression.Constant(obj),
    "myField"
);

Console.WriteLine(Expression.Lambda<Func<int>>(fieldExpr).Compile()());

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