Microsoft.JScript.Class.CheckIfValidExtensionOfSuperType C# (CSharp) Method

      private void CheckIfValidExtensionOfSuperType(){   
        this.GetIRForSuperType();
        ClassScope csc = this.superIR as ClassScope;
        if (csc != null){
          if (this.IsStatic){
            if (!csc.owner.IsStatic){
              this.superTypeExpression.context.HandleError(JSError.NestedInstanceTypeCannotBeExtendedByStatic);
              this.superIR = Typeob.Object;
              this.superTypeExpression = null;
            }
          }else{
            if (!csc.owner.IsStatic && this.enclosingScope != csc.owner.enclosingScope){
              this.superTypeExpression.context.HandleError(JSError.NestedInstanceTypeCannotBeExtendedByStatic);
              this.superIR = Typeob.Object;
              this.superTypeExpression = null;
            }
          }
        }
        this.GetSuperTypeMembers();
        this.GetStartIndexForEachName();
        
        bool checkCLSCompliance = this.NeedsToBeCheckedForCLSCompliance();
        if (checkCLSCompliance)
          this.CheckMemberNamesForCLSCompliance();

        //First check only the methods the implement interfaces
        for (int i = 0, n = this.fields.Length; i < n; i++){
          JSMemberField field = this.fields[i];
          if (field.IsLiteral){
            Object value = field.value;
            if (value is FunctionObject){
              JSMemberField startMethod = field;
              while(true){
                FunctionObject func = (FunctionObject)value;
                if (func.implementedIface == null) break;
                this.CheckMethodDeclarationConsistency(func);
                if (func.implementedIfaceMethod == null)
                  func.funcContext.HandleError(JSError.NoMethodInBaseToOverride);
                if (field.IsPublic || field.IsFamily || field.IsFamilyOrAssembly)
                  func.CheckCLSCompliance(checkCLSCompliance);
                field = field.nextOverload;
                if (field == null) break;
                value = field.value;
              }
              continue;
            }else if (value is JSProperty){
              continue;
            }
          }
        }
        for (int i = 0, n = this.fields.Length; i < n; i++){
          JSMemberField field = this.fields[i];
          if (field.IsLiteral){
            Object value = field.value;
            if (value is FunctionObject){
              JSMemberField startMethod = field;
              while(true){
                FunctionObject func = (FunctionObject)value;
                if (func.implementedIface != null) break;
                this.CheckMethodDeclarationConsistency(func);
                if (field.IsPublic || field.IsFamily || field.IsFamilyOrAssembly)
                  func.CheckCLSCompliance(checkCLSCompliance);
                field = field.nextOverload;
                if (field == null) break;
                value = field.value;
              }
              continue;
            }else if (value is JSProperty){
              continue;
            }
          }
          this.CheckFieldDeclarationConsistency(field);
          if (field.IsPublic || field.IsFamily || field.IsFamilyOrAssembly)
            field.CheckCLSCompliance(checkCLSCompliance);
        }
      }