added culture independent parsing (#3731)

Author: srsaggam

src/Microsoft.ML.AutoML/Utils/MLNetUtils/Conversions.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using System.Globalization;
 
 namespace Microsoft.ML.AutoML
 {
@@ -25,7 +26,7 @@ public static bool TryParse(in TX src, out R4 dst)
                 dst = R4.NaN;
                 return true;
             }
-            if (float.TryParse(str, out dst))
+            if (float.TryParse(str, NumberStyles.Float, CultureInfo.InvariantCulture, out dst))
             {
                 return true;
             }

src/Microsoft.ML.AutoML/Utils/SweepableParamAttributes.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using System.Globalization;
 using System.Linq;
 using System.Text;
 
@@ -144,7 +145,7 @@ public SweepableFloatParam(float min, float max, float stepSize = -1, int numSte
 
         public override void SetUsingValueText(string valueText)
         {
-            RawValue = float.Parse(valueText);
+            RawValue = float.Parse(valueText, CultureInfo.InvariantCulture);
         }
 
         public override SweepableParam Clone() =>