is it possible to define multiple vertex/fragment shader in one pass?

hi all,

I am translating a old XNA *.fx shader effect to Unity5. previously I defined multiple vertex and pixel shaders, and compiled them in arrays, and use some parameter to tell the rendering pipeline which vertex/fragment shader combinations to use in one pass:

VertexShader VSArray[3] = { compile vs_2_0 VSSin(), compile vs_2_0 VSSquare(), compile vs_2_0 VSLinear(), };

PixelShader PSArray[2] = { compile ps_2_0 PSNone(), compile ps_2_0 PSGaussian(), };

technique Technique1 { pass Pass1 { VertexShader = (VSArray[VSIndex]); PixelShader = (PSArray[PSIndex]); } }

---

but in unity5 shaderlab, I don't have a clue how to achieve this. I tried to define more than one vertex/fragment shaders:

Shader "myshader" { Properties {

     sigma("Sigma", Float) = 0.05
     sf("SF", Float) = 0.2
     time("Time", Float)=0
 }
     SubShader
 {
     Tags { "RenderType" = "Opaque" "Queue" = "Transparent" }
     Blend SrcAlpha OneMinusSrcAlpha
     LOD 100

     Pass
     {
         CGPROGRAM
         #pragma vertex vert
         #pragma vertex vert1
         #pragma fragment frag
         # include "UnityCG.cginc"
           
              //.....
         ENDCG
      }
 }

}

---

and unity5 editor showed "Duplicated #pragma...."

I am wondering is it possible to do something similar to my old .fx effect. or I have to separate each vertex/fragment shader in each shader file, and use some other parameter to combine them in one pass?

thanks,