diff --git a/src/idl_gen_csharp.cpp b/src/idl_gen_csharp.cpp
index 2178a656d95..223402f4c8a 100644
--- a/src/idl_gen_csharp.cpp
+++ b/src/idl_gen_csharp.cpp
@@ -650,12 +650,22 @@ class CSharpGenerator : public BaseGenerator {
   std::string GenKeyGetter(flatbuffers::StructDef& struct_def,
                            flatbuffers::FieldDef* key_field) const {
     // Get the getter for the key of the struct.
-    return GenGetterForLookupByKey(struct_def, key_field, "builder.DataBuffer",
-                                   "builder.DataBuffer.Length - o1.Value") +
-           ".CompareTo(" +
-           GenGetterForLookupByKey(struct_def, key_field, "builder.DataBuffer",
-                                   "builder.DataBuffer.Length - o2.Value") +
-           ")";
+    if (IsString(key_field->value.type)) {
+      return "string.CompareOrdinal(" +
+         GenGetterForLookupByKey(struct_def, key_field, "builder.DataBuffer", 
+           "builder.DataBuffer.Length - o1.Value") +
+         ", " +
+         GenGetterForLookupByKey(struct_def, key_field, "builder.DataBuffer",
+           "builder.DataBuffer.Length - o2.Value") + 
+         ")";
+    } else {
+      return GenGetterForLookupByKey(struct_def, key_field, "builder.DataBuffer",
+                     "builder.DataBuffer.Length - o1.Value") +
+         ".CompareTo(" +
+         GenGetterForLookupByKey(struct_def, key_field, "builder.DataBuffer", 
+                     "builder.DataBuffer.Length - o2.Value") +
+         ")";
+    }
   }
 
   // Get the value of a table verification function start
@@ -1585,7 +1595,11 @@ class CSharpGenerator : public BaseGenerator {
           "(start + middle), bb);\n";
 
       code += "      obj_.__assign(tableOffset, bb);\n";
-      code += "      int comp = obj_." + name + ".CompareTo(key);\n";
+      if (IsString(key_field->value.type)) {
+        code += "      int comp = string.CompareOrdinal(obj_." + name + ", key);\n";
+      } else {
+        code += "      int comp = obj_." + name + ".CompareTo(key);\n";
+      }
       code += "      if (comp > 0) {\n";
       code += "        span = middle;\n";
       code += "      } else if (comp < 0) {\n";
diff --git a/tests/MyGame/Example/Monster.cs b/tests/MyGame/Example/Monster.cs
index 7a87f061b21..0f5171dfe26 100644
--- a/tests/MyGame/Example/Monster.cs
+++ b/tests/MyGame/Example/Monster.cs
@@ -521,7 +521,7 @@ public struct Monster : IFlatbufferObject
   public static VectorOffset CreateSortedVectorOfMonster(FlatBufferBuilder builder, Offset<Monster>[] offsets) {
     Array.Sort(offsets,
       (Offset<Monster> o1, Offset<Monster> o2) =>
-        new Monster().__assign(builder.DataBuffer.Length - o1.Value, builder.DataBuffer).Name.CompareTo(new Monster().__assign(builder.DataBuffer.Length - o2.Value, builder.DataBuffer).Name));
+        string.CompareOrdinal(new Monster().__assign(builder.DataBuffer.Length - o1.Value, builder.DataBuffer).Name, new Monster().__assign(builder.DataBuffer.Length - o2.Value, builder.DataBuffer).Name));
     return builder.CreateVectorOfTables(offsets);
   }
 
@@ -533,7 +533,7 @@ public static VectorOffset CreateSortedVectorOfMonster(FlatBufferBuilder builder
       int middle = span / 2;
       int tableOffset = Table.__indirect(vectorLocation + 4 * (start + middle), bb);
       obj_.__assign(tableOffset, bb);
-      int comp = obj_.Name.CompareTo(key);
+      int comp = string.CompareOrdinal(obj_.Name, key);
       if (comp > 0) {
         span = middle;
       } else if (comp < 0) {
diff --git a/tests/union_value_collsion/union_value_collision_generated.cs b/tests/union_value_collsion/union_value_collision_generated.cs
index 65f8d07770c..870993382e2 100644
--- a/tests/union_value_collsion/union_value_collision_generated.cs
+++ b/tests/union_value_collsion/union_value_collision_generated.cs
@@ -292,7 +292,7 @@ public struct Collide : IFlatbufferObject
   public static VectorOffset CreateSortedVectorOfCollide(FlatBufferBuilder builder, Offset<Collide>[] offsets) {
     Array.Sort(offsets,
       (Offset<Collide> o1, Offset<Collide> o2) =>
-        new Collide().__assign(builder.DataBuffer.Length - o1.Value, builder.DataBuffer).Collide_.CompareTo(new Collide().__assign(builder.DataBuffer.Length - o2.Value, builder.DataBuffer).Collide_));
+        string.CompareOrdinal(new Collide().__assign(builder.DataBuffer.Length - o1.Value, builder.DataBuffer).Collide_, new Collide().__assign(builder.DataBuffer.Length - o2.Value, builder.DataBuffer).Collide_));
     return builder.CreateVectorOfTables(offsets);
   }
 
@@ -304,7 +304,7 @@ public static VectorOffset CreateSortedVectorOfCollide(FlatBufferBuilder builder
       int middle = span / 2;
       int tableOffset = Table.__indirect(vectorLocation + 4 * (start + middle), bb);
       obj_.__assign(tableOffset, bb);
-      int comp = obj_.Collide_.CompareTo(key);
+      int comp = string.CompareOrdinal(obj_.Collide_, key);
       if (comp > 0) {
         span = middle;
       } else if (comp < 0) {