_MainTex_ST Redefinition error

I need some help I'm trying to put together a particle shader using the surface shader mixed with the soft particle shader and It says the "Redefinition of _MainTex_ST at line 126 (d3d11)" but the code is only 117 lines long. could I have some help with this. I doubt I'm even doing this correctly and need help doing this correctly. thank you.

 Shader "Particles/SurfaceParticle(Soft)" {
  Properties {
      _TintColor ("Tint Color", Color) = (0.5,0.5,0.5,0.5)
      _MainTex ("Particle Texture", 2D) = "white" {}
      _InvFade ("Soft Particles Factor", Range(0.01,3.0)) = 1.0
  }
 
           Category {
      //Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" }
      Blend SrcAlpha OneMinusSrcAlpha
      AlphaTest Greater .01
      ColorMask RGB
      Cull Off Lighting On ZWrite Off Fog { Color (0,0,0,0) }
      BindChannels {
          Bind "Color", color
          Bind "Vertex", vertex
          Bind "TexCoord", texcoord
      }
 SubShader {
         Tags { "Queue"="Transparent" "RenderType"="Transparent" }
         CGPROGRAM
           //#pragma surface surf SimpleLambert
           #pragma surface surf Lambert alpha
           half4 LightingSimpleLambert (SurfaceOutput s, half3 lightDir, half atten) {
               half NdotL = dot (s.Normal, lightDir);
               half4 c;
               c.rgb = s.Albedo * _LightColor0.rgb * (NdotL * atten);
               c.a = s.Alpha;
               return c;
           }
   
         struct Input {
             float2 uv_MainTex;
         };
         
         sampler2D _MainTex;
         fixed4 _TintColor;
         
         void surf (Input IN, inout SurfaceOutput o) {
             o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb;
             o.Alpha = tex2D (_MainTex, IN.uv_MainTex).a;
         }
 
         struct appdata_t {
                  float4 vertex : POSITION;
                  fixed4 color : COLOR;
                  float2 texcoord : TEXCOORD0;
              };
  
              struct v2f {
                  float4 vertex : POSITION;
                  fixed4 color : COLOR;
                  float2 texcoord : TEXCOORD0;
                  #ifdef SOFTPARTICLES_ON
                  float4 projPos : TEXCOORD1;
                  #endif
              };
 
              float4 _MainTex_ST;
  
              v2f vert (appdata_t v)
              {
                  v2f o;
                  o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
                  #ifdef SOFTPARTICLES_ON
                  o.projPos = ComputeScreenPos (o.vertex);
                  COMPUTE_EYEDEPTH(o.projPos.z);
                  #endif
                  o.color = v.color;
                  o.texcoord = TRANSFORM_TEX(v.texcoord,_MainTex);
                  return o;
              }
  
              sampler2D _CameraDepthTexture;
              float _InvFade;
              
              fixed4 frag (v2f i) : COLOR
              {
                  #ifdef SOFTPARTICLES_ON
                  float sceneZ = LinearEyeDepth (UNITY_SAMPLE_DEPTH(tex2Dproj(_CameraDepthTexture, UNITY_PROJ_COORD(i.projPos))));
                  float partZ = i.projPos.z;
                  float fade = saturate (_InvFade * (sceneZ-partZ));
                  i.color.a *= fade;
                  #endif
                  
                  return 2.0f * i.color * _TintColor * tex2D(_MainTex, i.texcoord);
              }
 
         ENDCG
         }
 
      // ---- Fragment program cards
 
  
      // ---- Dual texture cards
      SubShader {
          Pass {
              SetTexture [_MainTex] {
                  constantColor [_TintColor]
                  combine constant * primary
              }
              SetTexture [_MainTex] {
                  combine texture * previous DOUBLE
              }
          }
      }
      
      // ---- Single texture cards (does not do color tint)
      SubShader {
          Pass {
              SetTexture [_MainTex] {
                  combine texture * primary
              }
          }
      }
  }
  }