Adapt to Enumerator -> Enumerable S.R.Metadata API change

src/Compilers/CSharp/Test/Emit/PDB/PortablePdbTests.cs

@@ -49,12 +49,9 @@ public static void Main()
 
                     var name = mdReader.GetString(method.Name);
 
-                    var spReader = methodDebugInfo.GetSequencePointEnumerator();
-
                     TextWriter writer = new StringWriter();
-                    while (spReader.MoveNext())
+                    foreach (var sp in methodDebugInfo.GetSequencePoints())
                     {
-                        var sp = spReader.Current;
                         if (sp.IsHidden)
                         {
                             writer.WriteLine($"{sp.Offset}: <hidden>");

src/Debugging/Microsoft.DiaSymReader.PortablePdb/MethodMap.cs

@@ -177,28 +177,27 @@ private static ImmutableArray<ImmutableArray<MethodLineExtent>> PartitionToNonOv
                 {
                     continue;
                 }
-                                
+
                 // sequence points:
-                var spReader = methodBody.GetSequencePointEnumerator();
                 DocumentHandle currentDocument = methodBody.Document;
 
                 int minLine = int.MaxValue;
                 int maxLine = int.MinValue;
-                while (spReader.MoveNext())
+                foreach (var sequencePoint in methodBody.GetSequencePoints())
                 {
-                    if (spReader.Current.IsHidden)
+                    if (sequencePoint.IsHidden)
                     {
                         continue;
                     }
 
-                    int startLine = spReader.Current.StartLine;
-                    int endLine = spReader.Current.EndLine;
+                    int startLine = sequencePoint.StartLine;
+                    int endLine = sequencePoint.EndLine;
 
-                    if (spReader.Current.Document != currentDocument)
+                    if (sequencePoint.Document != currentDocument)
                     {
                         yield return KeyValuePair.Create(currentDocument, new MethodLineExtent(methodDebugHandle, minLine, maxLine));
 
-                        currentDocument = spReader.Current.Document;
+                        currentDocument = sequencePoint.Document;
                         minLine = startLine;
                         maxLine = endLine;
                     }

src/Debugging/Microsoft.DiaSymReader.PortablePdb/SymDocument.cs

@@ -50,16 +50,14 @@ public int FindClosestLine(int line, out int closestLine)
 
                 // enumerate method sequence points:
                 var body = mdReader.GetMethodDebugInformation(extent.Method);
-                var spReader = body.GetSequencePointEnumerator();
-
-                while (spReader.MoveNext())
+                foreach (var sequencePoint in body.GetSequencePoints())
                 {
-                    if (spReader.Current.IsHidden || spReader.Current.Document != Handle)
+                    if (sequencePoint.IsHidden || sequencePoint.Document != Handle)
                     {
                         continue;
                     }
 
-                    int startLine = spReader.Current.StartLine;
+                    int startLine = sequencePoint.StartLine;
                     if (startLine >= line && startLine < result)
                     {
                         result = startLine;

src/Debugging/Microsoft.DiaSymReader.PortablePdb/SymMethod.cs

@@ -33,9 +33,9 @@ internal SymMethod(SymReader symReader, MethodDebugInformationHandle handle)
             DebugHandle = handle;
         }
 
-        private SequencePointEnumerator GetSequencePointEnumerator()
+        private SequencePointCollection.Enumerator GetSequencePointEnumerator()
         {
-            return SymReader.MetadataReader.GetMethodDebugInformation(DebugHandle).GetSequencePointEnumerator();
+            return SymReader.MetadataReader.GetMethodDebugInformation(DebugHandle).GetSequencePoints().GetEnumerator();
         }
 
         private RootScopeData GetRootScopeData()

src/Test/PdbUtilities/Metadata/MetadataVisualizer.cs

@@ -545,15 +545,13 @@ private string FormatImports(ImportScope scope)
 
             var sb = new StringBuilder();
 
-            var importsReader = scope.GetImportDefinitionEnumerator();
-            while (importsReader.MoveNext())
+            foreach (var import in scope.GetImports())
             {
                 if (sb.Length > 0)
                 {
                     sb.Append(", ");
                 }
 
-                var import = importsReader.Current;
                 switch (import.Kind)
                 {
                     case ImportDefinitionKind.ImportNamespace:
@@ -1517,11 +1515,10 @@ private void WriteMethodBody()
 
                 try
                 {
-                    var spReader = entry.GetSequencePointEnumerator();
-                    while (spReader.MoveNext())
+                    foreach (var sequencePoint in entry.GetSequencePoints())
                     {
                         _writer.Write("  ");
-                        _writer.WriteLine(SequencePoint(spReader.Current));
+                        _writer.WriteLine(sequencePoint);
                     }
                 }
                 catch (BadImageFormatException)