c# - Mod_Color.cs(55,55): Error CS0241: Default parameter specifiers are not permitted (CS0241) (Assembly-CSharp) -

i error while trying compile in c# (in monodevelop unity) please tell me how can fix it

mod_color.cs(55,55): error cs0241: default parameter specifiers not permitted (cs0241) (assembly-csharp) 

code:

namespace testhack.render {     using system;     using system.runtime.interopservices;     using unityengine;      public class mod_color     {         private color color;          public mod_color(float r, float g, float b, float = 255f)         {             this.color = new color(r / 255f, g / 255f, b / 255f, / 255f);         }          public color get()         {             return this.color;         }     } } 

use 2 overloads:

public class mod_color {     private color color;      public mod_color(float r, float g, float b)     {         this.color = mod_color(r, g, b, 255f);     }      public mod_color(float r, float g, float b, float a)     {         this.color = new color(r / 255f, g / 255f, b / 255f, / 255f);     }      public color get()     {         return this.color;     } } 

it seems using .net framework or mono framework doesn't support default parameter specifiers. using overload works same way without having modify existing code.