c# - Is it possible to restrict generic overload to property type? -

the question can somehow restrict generic overload strictly property type.. not clear now, here example:

i have class

public class obj {     public double width { get; set; }     public float widthf { get; set; } } 

and extension it

public static class testgenericoverride {     public static void do<tobj, tprop>(this tobj src,          expression<func<tobj, tprop>> expr, tprop val)     {         console.writeline("do: typeof(tprop) = {0}", typeof(tprop).name);     } } 

and main

static void main(string[] args) {     var o = new obj();      o.do(p => p.width, 100);    //1: typeof(tprop) = double     o.do(p => p.width, 100.0);  //2: typeof(tprop) = double      o.do(p => p.widthf, 100);   //3: typeof(tprop) = single     o.do(p => p.widthf, 100.9); //4: typeof(tprop) = double      console.readline(); } 

what want make last call (#4) unavailable. possible?

in other words: if type of property in expression float, want float-overload available, not double-overload

thank you!

this job:

    public static void do<tobj, tprop, tvalue>(this tobj src,        expression<func<tobj, tprop>> expr, tvalue val) tvalue: tprop     {         console.writeline("do: typeof(tprop) = {0}", typeof(tprop).name);     } 

new value needs same type property. means not #4 doesn't work #1 , #3 because , int not float. implicit conversion not allowed using extension.