Use nameof() in calls to ArgumentException ctor

src/Compilers/Core/Portable/Text/LinePositionSpan.cs

@@ -23,7 +23,7 @@ public LinePositionSpan(LinePosition start, LinePosition end)
         {
             if (end < start)
             {
-                throw new ArgumentException("end", CodeAnalysisResources.EndMustNotBeLessThanStart);
+                throw new ArgumentException(CodeAnalysisResources.EndMustNotBeLessThanStart, nameof(end));
             }
 
             _start = start;

src/Compilers/Test/Utilities/CSharp/Extensions.cs

@@ -41,7 +41,7 @@ public static SyntaxNodeOrToken FindNodeOrTokenByKind(this SyntaxTree syntaxTree
         {
             if (!(occurrence > 0))
             {
-                throw new ArgumentException("Specified value must be greater than zero.", "occurrence");
+                throw new ArgumentException("Specified value must be greater than zero.", nameof(occurrence));
             }
             SyntaxNodeOrToken foundNode = default(SyntaxNodeOrToken);
             if (TryFindNodeOrToken(syntaxTree.GetCompilationUnitRoot(), kind, ref occurrence, ref foundNode))

src/Compilers/Test/Utilities/Core2/DirectoryHelper.cs

@@ -16,7 +16,7 @@ public DirectoryHelper(string path)
         {
             if (!Directory.Exists(path))
             {
-                throw new ArgumentException("Directory '" + path + "' does not exist.", "path");
+                throw new ArgumentException("Directory '" + path + "' does not exist.", nameof(path));
             }
 
             _rootPath = path;

src/ExpressionEvaluator/Core/Test/ResultProvider/Debugger/Engine/DkmDataContainer.cs

@@ -35,7 +35,7 @@ public abstract class DkmDataContainer
             {
                 if (_dataItems.ContainsKey(key))
                 {
-                    throw new ArgumentException("Data item already exists", "item");
+                    throw new ArgumentException("Data item already exists", nameof(item));
                 }
             }
 

src/Scripting/Core/InteractiveAssemblyLoader.cs

@@ -148,7 +148,7 @@ public AssemblyLoadResult LoadFromPath(string path)
 
             if (!PathUtilities.IsAbsolute(path))
             {
-                throw new ArgumentException("Path must be absolute", "path");
+                throw new ArgumentException("Path must be absolute", nameof(path));
             }
 
             try

src/Scripting/Test/ScriptEngine.cs

@@ -303,7 +303,7 @@ internal static void ValidateNamespace(string @namespace)
 
             if (!@namespace.IsValidClrNamespaceName())
             {
-                throw new ArgumentException("Invalid namespace name", "namespace");
+                throw new ArgumentException("Invalid namespace name", nameof(@namespace));
             }
         }
 

src/Test/Utilities/DiagnosticExtensions.cs

@@ -64,7 +64,7 @@ private static void Verify(IEnumerable<Diagnostic> actual, DiagnosticDescription
         {
             if (expected == null)
             {
-                throw new ArgumentException("Must specify expected errors.", "expected");
+                throw new ArgumentException("Must specify expected errors.", nameof(expected));
             }
 
             var unmatched = actual.Select(d => new DiagnosticDescription(d, errorCodeOnly)).ToList();

src/Test/Utilities/TestHelpers.cs

@@ -14,7 +14,7 @@ public static IEnumerable<Type> GetAllTypesImplementingGivenInterface(Assembly a
         {
             if (assembly == null || interfaceType == null || !interfaceType.IsInterface)
             {
-                throw new ArgumentException("interfaceType is not an interface.", "interfaceType");
+                throw new ArgumentException("interfaceType is not an interface.", nameof(interfaceType));
             }
 
             return assembly.GetTypes().Where((t) =>