<PackageReference Include="Microsoft.CSharp" Version="4.4.0-preview2-25405-01" />

Expr

abstract class Expr
namespace Microsoft.CSharp.RuntimeBinder.Semantics { internal abstract class Expr { internal object RuntimeObject { get; set; } internal CType RuntimeObjectActualType { get; set; } public ExpressionKind Kind { get; } public EXPRFLAG Flags { get; set; } public bool IsOptionalArgument { get; set; } public string ErrorString { get; set; } public virtual CType Type => null; public bool IsOK => !HasError; public bool HasError { get; set; } protected Expr(ExpressionKind kind) { Kind = kind; } public virtual void SetMismatchedStaticBit() { HasError = true; } public void SetError() { HasError = true; } } }