MakeGetter code

gistfile1.txt

class test
{
   public string sam { get; set; }
   public int anumber { get; set; }
}

void Main()
{
   var z = new test { sam = "sam", anumber = 99};
   
   var x1 =  MakeGetter<test,int>("anumber");
   var x2 =  MakeGetter<test,string>("sam");
   
   x1(z).Dump();
   x2(z).Dump();
}

Func<T, RT> MakeGetter<T,RT>(string propertyName)
{
    ParameterExpression input = Expression.Parameter(typeof(T));

    var expr = Expression.Property(input, typeof(T).GetProperty(propertyName));

    return Expression.Lambda<Func<T, RT>>(expr, input).Compile();  
}

Results

99
sam