reveiw comments

Author: artidoro

src/Microsoft.ML.Data/Transforms/ColumnConcatenatingEstimator.cs

@@ -12,7 +12,7 @@
 namespace Microsoft.ML.Transforms
 {
     /// <summary>
-    /// Concatenates columns in an <see cref="IDataView"/> together.
+    /// Concatenates columns in an <see cref="IDataView"/> into one single column. Estimator for the <see cref="ColumnConcatenatingTransformer"/>.
     /// </summary>
     public sealed class ColumnConcatenatingEstimator : IEstimator<ColumnConcatenatingTransformer>
     {
@@ -25,7 +25,7 @@ public sealed class ColumnConcatenatingEstimator : IEstimator<ColumnConcatenatin
         /// </summary>
         /// <param name="env">The local instance of <see cref="IHostEnvironment"/>.</param>
         /// <param name="outputColumnName">The name of the resulting column.</param>
-        /// <param name="inputColumnNames">The columns to concatenate together.</param>
+        /// <param name="inputColumnNames">The columns to concatenate into one single column.</param>
         internal ColumnConcatenatingEstimator(IHostEnvironment env, string outputColumnName, params string[] inputColumnNames)
         {
             Contracts.CheckValue(env, nameof(env));

src/Microsoft.ML.Data/Transforms/ColumnConcatenatingTransformer.cs

@@ -15,6 +15,7 @@
 using Microsoft.ML.Model;
 using Microsoft.ML.Model.Onnx;
 using Microsoft.ML.Model.Pfa;
+using Microsoft.ML.Transforms;
 using Newtonsoft.Json.Linq;
 
 [assembly: LoadableClass(ColumnConcatenatingTransformer.Summary, typeof(IDataTransform), typeof(ColumnConcatenatingTransformer), typeof(ColumnConcatenatingTransformer.TaggedOptions), typeof(SignatureDataTransform),
@@ -34,7 +35,8 @@ namespace Microsoft.ML.Data
     using PfaType = PfaUtils.Type;
 
     /// <summary>
-    /// Concatenates columns in an <see cref="IDataView"/> together.
+    /// Concatenates columns in an <see cref="IDataView"/> into one single column. Please see <see cref="ColumnConcatenatingEstimator"/> for
+    /// constructing <see cref="ColumnConcatenatingTransformer"/>.
     /// </summary>
     public sealed class ColumnConcatenatingTransformer : RowToRowTransformerBase
     {