Vb To C# Converter

Here's the converted C# class following the best practices and patterns for .NET Core 8:

using System;
using System.Collections.Generic;
using System.Linq;

public class DataGrid
{
    public string Title { get; set; }
    public ColumnColl GridColumns { get; set; } = new ColumnColl();
    public RowColl GridRows { get; set; } = new RowColl();

    public class GridColumn
    {
        public DisplayFormat ColumnDisplayFormat { get; set; }
        public string DisplayName { get; set; }
        public string SourceName { get; set; }
        public int Index { get; set; }
        public string MinValue { get; set; }
        public string MaxValue { get; set; }
        public int UniqueValues { get; set; }
        public string MostCommon { get; set; }
        public string LeastCommon { get; set; }
        public List<string> ColumnValues { get; set; } = new List<string>();

        private Dictionary<string, int> ColDictionary { get; set; } = new Dictionary<string, int>();

        public void UpdateDictionary(string colValue)
        {
            string key = wpm_GetStringValue(colValue);
            if (ColDictionary.ContainsKey(key))
            {
                if (ColDictionary.TryGetValue(key, out int value))
                {
                    ColDictionary[key] = value + 1;
                }
            }
            else
            {
                ColDictionary.Add(key, 1);
                UniqueValues++;
            }
        }

        public void SetCommonValues()
        {
            MostCommon = ColDictionary.OrderBy(entry => entry.Value)
                                      .Select(entry => $"'{entry.Key}' in {entry.Value} rows")
                                      .LastOrDefault();
            LeastCommon = ColDictionary.OrderBy(entry => entry.Value)
                                       .Select(entry => $"'{entry.Key}' in {entry.Value} rows")
                                       .FirstOrDefault();
            ColumnValues.Clear();
            ColumnValues.AddRange(ColDictionary.OrderBy(entry => entry.Key)
                                               .Select(entry => entry.Key)
                                               .ToArray());
        }
    }

    public class ColumnColl : List<GridColumn> { }

    public class ColumnValue
    {
        public string Value { get; set; }
        public int Count { get; set; }
    }

    public class GridRow
    {
        public string Name { get; set; }
        public List<string> Value { get; set; } = new List<string>();
    }

    public class RowColl : List<GridRow> { }

    // Placeholder for the wpm_GetStringValue method
    private static string wpm_GetStringValue(string value)
    {
        // Implement the logic for wpm_GetStringValue here
        return value;
    }
}

Explanation:

1. Properties and Fields: Converted VB.NET properties to C# properties with appropriate getters and setters.
2. Collections: Used List<T> for collections and initialized them in the property declarations.
3. Methods: Converted Sub and Function to C# methods.
4. LINQ: Used LINQ for sorting and selecting values from the dictionary.
5. Naming Conventions: Followed C# naming conventions (PascalCase for properties and classes, camelCase for local variables).
6. Dictionary Operations: Used TryGetValue for safe dictionary access and manipulation.
7. Static Method Placeholder: Added a placeholder for the wpm_GetStringValue method, which needs to be implemented based on its VB.NET logic.

This C# class should be compatible with .NET Core 8 and follows best practices for readability and maintainability.