runtime: GetColumnSchema not supported

@pantonis I’ve ended up copying solution from net 462:

        private class DataRowDbColumn : DbColumn
        {
            #region Fields
           
            private readonly DataColumnCollection schemaColumns;       
            private readonly DataRow schemaRow;

            #endregion

            #region Constructors and Destructors
            
            public DataRowDbColumn(DataRow readerSchemaRow, DataColumnCollection readerSchemaColumns)
            {
                this.schemaRow = readerSchemaRow;
                this.schemaColumns = readerSchemaColumns;
                this.PopulateFields();
            }

            #endregion

            #region Methods

            private T GetDbColumnValue<T>(string columnName)
            {
                if (!this.schemaColumns.Contains(columnName))
                {
                    return default(T);
                }

                object schemaObject = this.schemaRow[columnName];
                if (schemaObject is T variable)
                {
                    return variable;
                }

                return default(T);
            }

            /// <summary>
            /// </summary>
            private void PopulateFields()
            {
                this.AllowDBNull = this.GetDbColumnValue<bool?>(SchemaTableColumn.AllowDBNull);
                this.BaseCatalogName = this.GetDbColumnValue<string>(SchemaTableOptionalColumn.BaseCatalogName);
                this.BaseColumnName = this.GetDbColumnValue<string>(SchemaTableColumn.BaseColumnName);
                this.BaseSchemaName = this.GetDbColumnValue<string>(SchemaTableColumn.BaseSchemaName);
                this.BaseServerName = this.GetDbColumnValue<string>(SchemaTableOptionalColumn.BaseServerName);
                this.BaseTableName = this.GetDbColumnValue<string>(SchemaTableColumn.BaseTableName);
                this.ColumnName = this.GetDbColumnValue<string>(SchemaTableColumn.ColumnName);
                this.ColumnOrdinal = this.GetDbColumnValue<int?>(SchemaTableColumn.ColumnOrdinal);
                this.ColumnSize = this.GetDbColumnValue<int?>(SchemaTableColumn.ColumnSize);
                this.IsAliased = this.GetDbColumnValue<bool?>(SchemaTableColumn.IsAliased);
                this.IsAutoIncrement = this.GetDbColumnValue<bool?>(SchemaTableOptionalColumn.IsAutoIncrement);
                this.IsExpression = this.GetDbColumnValue<bool>(SchemaTableColumn.IsExpression);
                this.IsHidden = this.GetDbColumnValue<bool?>(SchemaTableOptionalColumn.IsHidden);
                this.IsIdentity = this.GetDbColumnValue<bool?>("IsIdentity");
                this.IsKey = this.GetDbColumnValue<bool?>(SchemaTableColumn.IsKey);
                this.IsLong = this.GetDbColumnValue<bool?>(SchemaTableColumn.IsLong);
                this.IsReadOnly = this.GetDbColumnValue<bool?>(SchemaTableOptionalColumn.IsReadOnly);
                this.IsUnique = this.GetDbColumnValue<bool?>(SchemaTableColumn.IsUnique);
                this.NumericPrecision = this.GetDbColumnValue<int?>(SchemaTableColumn.NumericPrecision);
                this.NumericScale = this.GetDbColumnValue<int?>(SchemaTableColumn.NumericScale);
                this.UdtAssemblyQualifiedName = this.GetDbColumnValue<string>("UdtAssemblyQualifiedName");
                this.DataType = this.GetDbColumnValue<Type>(SchemaTableColumn.DataType);
                this.DataTypeName = this.GetDbColumnValue<string>("DataTypeName");
            }

            #endregion
        }

        /// <summary>
        /// Custom column schema to support lack of native method.
        /// </summary>
        private static ReadOnlyCollection<DbColumn> GetCustomColumnSchema(this SqlDataReader reader)
        {
            IList<DbColumn> columnSchema = new List<DbColumn>();
            DataTable schemaTable = reader.GetSchemaTable();

            // ReSharper disable once PossibleNullReferenceException
            DataColumnCollection schemaTableColumns = schemaTable.Columns;
            foreach (DataRow row in schemaTable.Rows)
            {
                DbColumn dbColumn = new DataRowDbColumn(row, schemaTableColumns);
                columnSchema.Add(dbColumn);
            }

            ReadOnlyCollection<DbColumn> readOnlyColumnSchema = new ReadOnlyCollection<DbColumn>(columnSchema);
            return readOnlyColumnSchema;
        }

@David-Engel Is that repo public? Do you have a link to the bug report? I’m experiencing the same issues where changing a project to target .NET 4.7.2 broke my application due to System.Data.Common no-longer having the correct DbDataReaderExtensions implementation.

The temporary workaround is to target .net 4.6.2. But we can’t stay on it forever. When is this going to be resolved? It’s been 6 months already.