Main namespace types2445 (#2885)

* moving IHostEnvironment, IExceptionContext etc from MIcrosoft.ML to Microsoft.Ml.Runtime

moving Loss related types  from MIcrosoft.ML to Microsoft.Ml.Trainers

* partial namespace updates

* updating the usings to make the solution build, after the IHost changes

* adding back the semingly unused usings.
the 115 tests in CpuMathUtilsUnitTests pass locally

* restoring some readonly and casts.
Fixing 3 out of 5 analyzer test failures.

* fixing analyzer Contracts tests.

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/BootstrapSample.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/Cache.cs

@@ -1,6 +1,5 @@
 using System;
 using Microsoft.Data.DataView;
-using Microsoft.ML.Data;
 using Microsoft.ML.SamplesUtils;
 
 namespace Microsoft.ML.Samples.Dynamic

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/DataViewEnumerable.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.Data.DataView;
-using Microsoft.ML.Data;
 using Microsoft.ML.SamplesUtils;
 
 namespace Microsoft.ML.Samples.Dynamic

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/FilterRowsByColumn.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/FilterRowsByMissingValues.cs

@@ -1,5 +1,4 @@
 using System;
-using Microsoft.ML.Data;
 using Microsoft.ML.SamplesUtils;
 
 namespace Microsoft.ML.Samples.Dynamic

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/ShuffleRows.cs

@@ -1,5 +1,4 @@
 using System;
-using Microsoft.ML.Data;
 using Microsoft.ML.SamplesUtils;
 
 namespace Microsoft.ML.Samples.Dynamic

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/SkipRows.cs

@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using Microsoft.ML.Data;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     /// <summary>

docs/samples/Microsoft.ML.Samples/Dynamic/DataOperations/TakeRows.cs

@@ -1,7 +1,4 @@
 using System;
-using System.Collections.Generic;
-using Microsoft.ML.Data;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     /// <summary>

docs/samples/Microsoft.ML.Samples/Dynamic/FastTreeRegression.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/OnnxTransform.cs

@@ -2,7 +2,6 @@
 using System.Linq;
 using Microsoft.ML.Data;
 using Microsoft.ML.OnnxRuntime;
-using Microsoft.ML.Transforms;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/StopWordRemoverTransform.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.ML.Data;
-using Microsoft.ML.Transforms.Text;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/TensorFlow/TextClassification.cs

@@ -1,7 +1,6 @@
 using System;
 using System.IO;
 using Microsoft.ML.Data;
-using Microsoft.ML.Transforms.TensorFlow;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/LightGbm.cs

@@ -1,6 +1,4 @@
-using Microsoft.ML.Transforms;
-
-namespace Microsoft.ML.Samples.Dynamic.Trainers.BinaryClassification
+namespace Microsoft.ML.Samples.Dynamic.Trainers.BinaryClassification
 {
     public class LightGbm
     {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/PriorTrainerSample.cs

@@ -1,5 +1,4 @@
-using System;
-using Microsoft.ML.Data;
+using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/StochasticDualCoordinateAscentNonCalibrated.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Linq;
-using Microsoft.ML.Data;
+using Microsoft.ML.Trainers;
 
 namespace Microsoft.ML.Samples.Dynamic.Trainers.BinaryClassification
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/StochasticGradientDescent.cs

@@ -1,6 +1,4 @@
-using Microsoft.ML;
-
-namespace Microsoft.ML.Samples.Dynamic.Trainers.BinaryClassification
+namespace Microsoft.ML.Samples.Dynamic.Trainers.BinaryClassification
 {
     public static class StochasticGradientDescent
     {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/StochasticGradientDescentNonCalibrated.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-
-namespace Microsoft.ML.Samples.Dynamic
+namespace Microsoft.ML.Samples.Dynamic
 {
     public static class StochasticGradientDescentNonCalibrated
     {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/StochasticGradientDescentNonCalibratedWithOptions.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using Microsoft.ML.Trainers;
+using Microsoft.ML.Trainers;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/BinaryClassification/StochasticGradientDescentWithOptions.cs

@@ -1,5 +1,4 @@
-using Microsoft.ML;
-using Microsoft.ML.Trainers;
+using Microsoft.ML.Trainers;
 
 namespace Microsoft.ML.Samples.Dynamic.Trainers.BinaryClassification
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Trainers/Ranking/LightGbm.cs

@@ -1,6 +1,4 @@
-using Microsoft.ML;
-
-namespace Microsoft.ML.Samples.Dynamic.Trainers.Ranking
+namespace Microsoft.ML.Samples.Dynamic.Trainers.Ranking
 {
     public class LightGbm
     {

docs/samples/Microsoft.ML.Samples/Dynamic/Transforms/CopyColumns.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Transforms/CustomMappingSample.cs

@@ -1,6 +1,4 @@
 using System;
-using Microsoft.ML.Data;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     public static class CustomMapping

docs/samples/Microsoft.ML.Samples/Dynamic/Transforms/DropColumns.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Samples.Dynamic
 {

docs/samples/Microsoft.ML.Samples/Dynamic/Transforms/SelectColumns.cs

@@ -1,6 +1,4 @@
 using System;
-using Microsoft.ML.Data;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     public static class SelectColumns

docs/samples/Microsoft.ML.Samples/Dynamic/ValueMapping.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.Data.DataView;
-using Microsoft.ML.Data;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     public static partial class ValueMapping

docs/samples/Microsoft.ML.Samples/Dynamic/ValueMappingFloatToString.cs

@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.Data.DataView;
-using Microsoft.ML.Data;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     public static class ValueMappingFloatToString

docs/samples/Microsoft.ML.Samples/Dynamic/ValueMappingStringToArray.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.Data.DataView;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     public static class ValueMappingStringToArray

docs/samples/Microsoft.ML.Samples/Dynamic/ValueMappingStringToKeyType.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.Data.DataView;
-
 namespace Microsoft.ML.Samples.Dynamic
 {
     public static class ValueMappingStringToKeyType

docs/samples/Microsoft.ML.Samples/Static/FastTreeBinaryClassification.cs

@@ -1,5 +1,4 @@
 using System;
-using Microsoft.ML.Data;
 using Microsoft.ML.StaticPipe;
 
 namespace Microsoft.ML.Samples.Static

docs/samples/Microsoft.ML.Samples/Static/FastTreeRegression.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Linq;
-using Microsoft.ML.Data;
 using Microsoft.ML.StaticPipe;
 using Microsoft.ML.Trainers.FastTree;
 

docs/samples/Microsoft.ML.Samples/Static/LightGBMBinaryClassification.cs

@@ -1,5 +1,4 @@
 using System;
-using Microsoft.ML.Data;
 using Microsoft.ML.LightGBM.StaticPipe;
 using Microsoft.ML.StaticPipe;
 

docs/samples/Microsoft.ML.Samples/Static/LightGBMMulticlassWithInMemoryData.cs

@@ -1,10 +1,9 @@
-using Microsoft.ML.Data;
+using System;
+using System.Linq;
+using Microsoft.ML.Data;
 using Microsoft.ML.LightGBM.StaticPipe;
 using Microsoft.ML.SamplesUtils;
 using Microsoft.ML.StaticPipe;
-using System;
-using System.Collections.Generic;
-using System.Linq;
 
 namespace Microsoft.ML.Samples.Static
 {

docs/samples/Microsoft.ML.Samples/Static/SDCARegression.cs

@@ -1,5 +1,4 @@
 using System;
-using Microsoft.ML.Data;
 using Microsoft.ML.StaticPipe;
 using Microsoft.ML.Trainers;
 

src/Microsoft.ML.Core/CommandLine/ArgumentAttribute.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Linq;
+using Microsoft.ML.Runtime;
 
 namespace Microsoft.ML.CommandLine
 {

src/Microsoft.ML.Core/CommandLine/CharCursor.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using Microsoft.ML.Internal.Utilities;
+using Microsoft.ML.Runtime;
 
 namespace Microsoft.ML.CommandLine
 {