Extracts a property name string from an Expression.

PropertyNameSupport.cs

using System;
using System.Globalization;
using System.Linq.Expressions;
using System.Reflection;

public static class PropertyNameSupport
{
  private const string ExceptionMessageFormat = "Property expression {0}. Ensure calling with () => Property.";

  private const string ParameterName = "propertyExpression";

  [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters", Justification = "Changing to base type LambdaExpression causes callers to not be able to use () => Property.")]
  public static string ExtractPropertyNameFromExpression<T>(Expression<Func<T>> propertyExpression)
  {
      if (propertyExpression == null)
      {
          throw new ArgumentNullException(ParameterName);
      }

      var memberExpression = propertyExpression.Body as MemberExpression;
      if (memberExpression == null)
      {
          throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, ExceptionMessageFormat, "body is null"));
      }

      var property = memberExpression.Member as PropertyInfo;
      if (property == null)
      {
          throw new ArgumentException(string.Format(CultureInfo.InvariantCulture, ExceptionMessageFormat, "member is null"), ParameterName);
      }

      if (property.GetMethod.IsStatic)
      {
          throw new ArgumentException("member property is static.", ParameterName);
      }

      if (property.DeclaringType == null)
      {
          throw new ArgumentException("member property declaring type is null.", ParameterName);
      }

      return memberExpression.Member.Name;
  }
}