Revert "Removing NET check"

This reverts commit 753cd86.

Author: himgoyalmicro

src/Microsoft.DotNet.Wpf/src/PresentationBuildTasks/MS/Internal/Tasks/TaskHelper.cs

@@ -203,9 +203,11 @@ internal static string GetWholeExceptionMessage(Exception exception)
             while (e.InnerException != null)
             {
                 Exception eInner = e.InnerException;
-#pragma warning disable CA2249
+#if NET
+                if (!e.Message.Contains(eInner.Message, StringComparison.Ordinal))
+#else
                 if (e.Message.IndexOf(eInner.Message, StringComparison.Ordinal) == -1)
-#pragma warning restore CA2249
+#endif
                 {
                     message += ", ";
                     message += eInner.Message;

src/Microsoft.DotNet.Wpf/src/PresentationBuildTasks/Microsoft/Build/Tasks/Windows/UidManager.cs

@@ -518,9 +518,11 @@ private UidCollector ParseFile(string fileName)
                                 collector.RootElementLinePosition = reader.LinePosition;
                             }
 
-#pragma warning disable CA1847
+#if NET
+                            if (reader.Name.Contains('.'))
+#else
                             if (reader.Name.Contains("."))
-#pragma warning restore CA1847
+#endif
                             {
                                 // the name has a dot, which suggests it is a property tag.
                                 // we will ignore adding uid

src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/MarkupExtensionParser.cs

@@ -1465,9 +1465,11 @@ private string ResolveAttributeNamespaceURI(string prefix, string name, string p
                 // if the prefix was "" then
                 // 1) normal properties resolve to the parent Tag namespace.
                 // 2) Attached properties resolve to the "" default namespace.
-#pragma warning disable CA1847
+#if NET
+                if (!name.Contains('.'))
+#else
                 if (!name.Contains("."))
-#pragma warning restore CA1847
+#endif
                     attribNamespaceURI = parentURI;
                 else
                     attribNamespaceURI = _parserHelper.LookupNamespace("");
@@ -1626,9 +1628,11 @@ internal static void RemoveEscapes(ref string value)
                     if (builder == null)
                     {
                         builder = new StringBuilder(value.Length);
-#pragma warning disable CA1846
+#if NET
+                        builder.Append(value.AsSpan(0,i));
+#else
                         builder.Append(value.Substring(0,i));
-#pragma warning restore CA1846
+#endif
                     }
                     noEscape = false;
                 }

src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/XamlReaderHelper.cs

@@ -2738,9 +2738,11 @@ private string ResolveAttributeNamespaceURI(string prefix, string name, string p
                 // if the prefix was "" then
                 // 1) normal properties resolve to the parent Tag namespace.
                 // 2) Attached properties resolve to the "" default namespace.
-#pragma warning disable CA1847
+#if NET
+                if (!name.Contains('.'))
+#else
                 if (!name.Contains("."))
-#pragma warning restore CA1847
+#endif
                     attribNamespaceURI = parentURI;
                 else
                     attribNamespaceURI = XmlReader.LookupNamespace("");