public void AddCast(
ISyntaxFacts syntaxFacts,
SemanticModel semanticModel,
SyntaxEditor editor,
TForEachStatementSyntax forEachStatement,
CancellationToken cancellationToken)
{
var expression = syntaxFacts.GetExpressionOfForeachStatement(forEachStatement);
var loopOperation = (IForEachLoopOperation)semanticModel.GetRequiredOperation(forEachStatement, cancellationToken);
var variableDeclarator = (IVariableDeclaratorOperation)loopOperation.LoopControlVariable;
var enumerableType = semanticModel.Compilation.GetBestTypeByMetadataName(typeof(Enumerable).FullName !);
// These were already verified to be non-null in the analyzer.
Contract.ThrowIfNull(variableDeclarator.Symbol.Type);
Contract.ThrowIfNull(enumerableType);
var elementType = GetForEachElementType(semanticModel, forEachStatement);
var conversion = semanticModel.Compilation.ClassifyCommonConversion(elementType, variableDeclarator.Symbol.Type);
var rewritten = GetRewrittenCollection(editor.Generator, expression, variableDeclarator.Symbol.Type, conversion);
// Add an annotation for System.Linq.Enumerable so that we add a `using System.Linq;` if not present.
rewritten = rewritten.WithAdditionalAnnotations(
Simplifier.Annotation, Simplifier.AddImportsAnnotation, SymbolAnnotation.Create(enumerableType));
editor.ReplaceNode(expression, rewritten);
}