unity shader opaque alpha code example

Example: unity add transparency to shader

Shader "<Name>"
{
    Properties
    {
        _MainTex ("Base (RGB)", 2D) = "white" {}
        _Color ("Color (RGBA)", Color) = (1, 1, 1, 1)
    }
    SubShader
    {
        Tags {"Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent"}
        Lighting On
        ZWrite Off
        Blend SrcAlpha OneMinusSrcAlpha
        Cull front 
        LOD 100

        Pass 
        {
            CGPROGRAM

            #pragma vertex vert alpha
            #pragma fragment frag alpha

            #include "UnityCG.cginc"
            . 
            .
            .
            .
         }
         ENDCG
    }    
}